高中英语太空探索单选题80题

高中英语太空探索单选题80题
1. The ______ of the spaceship was damaged during the launch.
A. engine
B. wing
C. cabin
D. satellite
答案：A。

本题考查太空探索中相关词汇的意思及用法。

A 选项“engine”意为“引擎”，飞船的引擎在发射过程中受损，符合语境。

B 选项“wing”指“机翼”，通常用于飞机。

C 选项“cabin”是“船舱；客舱”。

D 选项“satellite”意思是“卫星”，与句子描述不符。

2. They conducted an experiment in the ______ environment of space.
A. zero-gravity
B. high-pressure
C. low-temperature
D. oxygen-rich
答案：A。

A 选项“zero-gravity”表示“零重力”，太空是零重力环境，符合太空探索的背景。

B 选项“high-pressure”是“高压”。

C 选项“low-temperature”为“低温”。

D 选项“oxygen-rich”意思是“富氧的”，在太空中并非是富氧环境。

3. The astronaut wore a special suit to protect himself from the ______ radiation.
A. ultraviolet
B. infrared
C. microwave
D. gamma
答案：D。

“gamma”是“伽马”，伽马射线辐射，在太空探索中宇航员需要防范伽马辐射。

A 选项“ultraviolet”指“紫外线”。

B 选项“infrared”是“红外线”。

C 选项“microwave”意为“微波”。

4. The mission aimed to explore the ______ of the universe.
A. mystery
B. secret
C. phenomenon
D. theory
答案：A。

“mystery”有“神秘；奥秘”的意思，探索宇宙的奥秘，符合太空探索的主题。

B 选项“secret”侧重于“秘密”。

C 选项“phenomenon”是“现象”。

D 选项“theory”指“理论”。

5. The space probe sent back valuable ______ about the planet.
A. information
B. news
C. message
D. report
答案：A。

“information”是“信息”，可以是各种类型的数据、事实等，太空探测器发回有价值的信息。

B 选项“news”通常指新闻、消息。

C 选项“message”一般指具体的消息、口信。

D 选项“report”是“报告”。

6. The spaceship, ______ was launched last month, has made significant progress in its mission.
A. which
B. that
C. when
D. where
答案：A。

本题考查定语从句。

先行词是“spaceship”（ 宇宙飞船），在从句中作主语，且是非限制性定语从句，只能用“which”，“that”不能引导非限制性定语从句，“when”在定语从句中作时间状语，“where”在定语从句中作地点状语，所以选A。

7. We'll go to the moon ______ the weather is fine.
A. as long as
B. as soon as
C. even though
D. so that
答案：A。

本题考查状语从句。

“as long as”表示“只要”，“as soon as”表示“一……就……”，“even though”表示“即使”，“so that”表示“以便，为了”。

根据句意，只要天气好我们就去月球，所以选A。

8. The astronaut ______ has been trained for many years is ready for the space mission.
A. who
B. whom
C. whose
D. which
答案：A。

本题考查定语从句。

先行词是“astronaut” 宇航员），在从句中作主语，所以用“who”，“whom”在定语从句中作宾语，“whose”在定语从句中作定语，“which”不能指人，所以选A。

9. ______ we explore the space, we need to overcome many difficulties.
A. While
B. When
C. Before
D. After
答案：A。

本题考查状语从句。

“while”表示“当……时候，强调动作同时进行”，“when”也表示“当……时候”，但“while”更强调动作的持续性，“before”表示“在……之前”，“after”表示“在……之后”。

根据句意，当我们探索太空时，需要克服很多困难，强调动作同时进行，所以选A。

10. The satellite ______ was sent into space last year is working well.
A. which
B. that
C. who
D. whose
答案：A。

本题考查定语从句。

先行词是“satellite”（ 卫星），在从
句中作主语，且是非限制性定语从句，只能用“which”，“that”不能引导非限制性定语从句，“who”不能指物，“whose”在定语从句中作定语，所以选A。

11. We ______ a lot about space exploration in the past few decades.
A. have learned
B. learned
C. learn
D. are learning
答案：A。

本题考查现在完成时。

“in the past few decades”是现在完成时的标志时间状语，表示从过去到现在的一段时间内所发生的动作，所以用“have learned”。

12. Space exploration ______ great progress since the 1960s.
A. makes
B. made
C. has made
D. is making
答案：C。

“since + 过去时间”是现在完成时的标志，强调动作从过去开始一直持续到现在，并对现在产生影响，所以用“has made”。

13. The scientists ______ on this space project for three years.
A. work
B. worked
C. have worked
D. are working
答案：C。

“for three years”是现在完成时的时间标志，表示动作持续了一段时间，用“have worked”。

14. They ______ a new planet every year, but they haven't found one yet.
A. discover
B. discovered
C. have discovered
D. are discovering
答案：A。

根据“every year”可知，这是一般现在时，表示经常发生的动作，主语是“they”，用动词原形“discover”。

15. So far, no one ______ to live on Mars for a long time.
A. has managed
B. managed
C. manages
D. is managing
答案：A。

“so far”是现在完成时的标志，意思是“到目前为止”，强调过去的动作对现在的影响，用“has managed”。

16. If humans could travel to other galaxies at the speed of light, our understanding of the universe ______ completely different.
A. would be
B. will be
C. is
D. was
答案：A。

本题考查虚拟语气。

从句“could travel”表示与现在事实相反的假设，主句要用“would + 动词原形”，A 选项“would be”符合虚拟语气的构成和用法。

17. In the science fiction movie, if the spaceship ______ more advanced technology, it ______ the dangerous asteroid field easily.
A. had; would pass
B. has; would pass
C. had had; would have passed
D. has had; would have passed
答案：A。

这道题考查混合虚拟语气。

从句表示与现在事实相反，用一般过去时“had”；主句表示与将来事实相反，用“would + 动词原形”“would pass”。

18. If aliens ______ friendly when they visited Earth, our reaction ______ much more welcoming.
A. were; would be
B. are; will be
C. had been; would have been
D. were; will be
答案：A。

从句“were”表示与现在事实相反的假设，主句“would be”符合虚拟语气的构成。

19. Suppose the astronauts ______ enough oxygen during the space mission, they ______ able to complete the exploration.
A. had; would be
B. had had; would have been
C. have; will be
D. had; will be
答案：A。

本题中从句“had”表示与现在事实相反，主句用“would be”。

20. If we ______ the possibility of life on other planets seriously now, our future space exploration ______ more fruitful.
A. considered; would be
B. consider; will be
C. had considered; would have been
D. consider; would be
答案：A。

从句“considered”表示与现在事实相反，主句用“would be”，符合虚拟语气的构成和用法。

21. The spaceship, designed to explore distant planets, _____ successfully launched last week.
A. was
B. being
C. having been
D. to be
答案：A。

本题考查谓语动词的时态和语态。

“last week”表明是过去的时间，spaceship 与launch 之间是被动关系，所以用一般过去时的被动语态was launched。

22. The astronaut, _____ in space for several months, is looking forward to returning to Earth.
A. staying
B. stayed
C. having stayed
D. to stay
答案：C。

本题考查非谓语动词的完成式。

“for several months”表示动作持续了一段时间，且stay 这个动作发生在look forward to 之前，所以用having stayed。

23. With many satellites _____ around the Earth, communication has become much easier.
A. orbiting
B. orbited
C. to orbit
D. orbit
答案：A。

本题考查现在分词作宾语补足语。

satellites 与orbit 之间是主动关系，所以用现在分词orbiting。

24. The telescope, _____ to observe distant galaxies, needs to be adjusted regularly.
A. used
B. using
C. to use
D. be used
答案：A。

本题考查过去分词作后置定语。

telescope 与use 之间是被动关系，所以用过去分词used。

25. The mission of exploring the unknown space, _____ challenging, is full of excitement.
A. being
B. to be
C. was
D. is
答案：A。

本题考查现在分词短语作状语。

“being challenging”在句中作状语，表示“具有挑战性”。

26. It is still unknown ______ life exists on other planets.
A. that
B. whether
C. what
D. if
答案：B。

本题考查名词性从句中宾语从句的引导词。

“It is still unknown”后接宾语从句，根据句意，“在其他星球上是否存在生命还未知”，A 选项“that”在宾语从句中无意义，C 选项“what”在宾语从句
中充当成分，此处不需要，D 选项“if”不能引导主语从句、表语从句和同位语从句，而此处是主语从句，“whether”表示“是否”，符合题意。

27. The question ______ we can land on Mars successfully remains to be answered.
A. that
B. if
C. whether
D. which
答案：C。

本题考查名词性从句中的同位语从句。

“The question”后的同位语从句解释说明“question”的内容，“我们能否成功登陆火星这个问题还有待回答”，A 选项“that”在同位语从句中不表示“是否”，B 选项“if”不能引导同位语从句，D 选项“which”在同位语从句中不符合题意，“whether”表示“是否”，符合句意。

28. What surprised us most was ______ he came to the party without being invited.
A. that
B. whether
C. what
D. /
答案：A。

本题考查名词性从句中的表语从句。

“What surprised us most was”后接表语从句，“他没被邀请就来参加聚会这件事让我们很惊讶”，从句意思完整，不缺成分，用“that”引导，B 选项“whether”表
示“是否”，C 选项“what”在从句中充当成分，此处不需要，D 选项此处不能省略引导词。

29. I have no idea ______ made him give up his dream of becoming an astronaut.
A. what
B. that
C. which
D. /
答案：A。

本题考查名词性从句中的同位语从句。

“I have no idea”后接同位语从句，“我不知道是什么让他放弃了成为宇航员的梦想”，从句缺少主语，B 选项“that”在同位语从句中不充当成分，C 选项“which”有选择的意味，不符合题意，A 选项“what”在从句中充当主语，符合句意。

30. The news ______ China has sent a new spaceship into space excited all of us.
A. that
B. which
C. /
D. what
答案：A。

本题考查名词性从句中的同位语从句。

“The news”后的同位语从句解释说明“news”的内容，“中国发射了一艘新的宇宙飞船进入太空的这个消息让我们所有人都很兴奋”，从句意思完整，不
缺成分，用“that”引导，B 选项“which”在同位语从句中不符合题意，C 选项此处不能省略引导词，D 选项“what”在从句中充当成分，此处不需要。

31. Among the recent space achievements, this one is ______ than the previous one.
A. more exciting
B. most exciting
C. exciting
D. the most exciting
答案：A。

本题考查形容词比较级的用法。

“more exciting”是“exciting”的比较级形式，用于两者之间的比较。

在这个句子中，是将这次的太空成就和之前的进行比较，所以用比较级。

32. The new space technology is ______ of all.
A. the most advanced
B. more advanced
C. advanced
D. most advanced
答案：A。

本题考查形容词最高级的用法。

“the most advanced”是“advanced”的最高级形式，用于三者或三者以上的比较。

这里是在所有的太空技术中进行比较，所以用最高级，且最高级前要加“the”。

33. This space mission was ______ successful than the last one.
A. less
B. least
C. more
D. much
答案：C。

本题考查比较级的用法。

“more successful”是“successful”的比较级形式。

根据句子意思，这次太空任务比上次更成功，所以用“more”。

34. The speed of this spaceship is ______ that one.
A. faster than
B. fast than
C. as fast as
D. the fastest
答案：A。

本题考查比较级的用法。

“faster than”表示“比……更快”，是“fast”的比较级形式。

这里是在比较两艘飞船的速度，所以用比较级。

35. Among these space experiments, this one is ______.
A. the best
B. better
C. good
D. well
答案：A。

本题考查最高级的用法。

“the best”是“good”的最高级形式，用于三者或三者以上的比较。

在这些太空实验中进行比较，用最高级，且最高级前要加“the”。

36. In the future, we ______ be able to travel to other galaxies easily.
A. can
B. could
C. may
D. might
答案：C。

本题考查情态动词的用法。

“can”表示能力或可能性，“could”是“can”的过去式，语气比“can”委婉；“may”表示可能性，可能性比“might”稍大；“might”可能性较小。

在这个句子中，对于未来能够轻松旅行到其他星系，“may”更符合一般的推测，所以选择C。

37. Scientists believe that humans ______ one day live on Mars.
A. must
B. should
C. will
D. would
答案：C。

“must”表示必须；“should”表示应该；“will”表示将来会；“would”是“will”的过去式。

根据句子“Scientists believe that...”，是对未来的一种预测，所以用“will”，选择C。

38. It ______ be very difficult to establish a base on the moon.
A. can
B. could
C. may
D. might
答案：C。

“can”和“could”强调能力；“may”和“might”表示可能性，“may”的可能性大于“might”。

在这个句子中，说在月球上建立基地可能会很难，“may”更恰当，故选C。

39. Space exploration ______ bring many benefits to humanity.
A. must
B. should
C. can
D. could
答案：C。

“must”是必须；“should”是应该；“can”表示能够、有可能；“could”是“can”的过去式，语气更委婉。

此句表达太空探索能够给人类带来许多好处，“can”最合适，答案选C。

40. We ______ find intelligent life in other solar systems in the future.
A. may
B. might
C. can
D. could
答案：A。

“may”和“might”都表示可能性，“may”可能性稍大；“can”和“could”更侧重于能力。

对于未来在其他太阳系中发现智慧生命，用“may”更符合推测，所以选择A。

41. Not only ______ to the moon but also they have explored other planets.
A. have humans traveled
B. humans have traveled
C. did humans travel
D. humans did travel
答案：A。

本题考查倒装句“Not only...but also...”的用法，Not only 位于句首时，其后的句子要用部分倒装，即把助动词提前，根据语境，这里是现在完成时，所以把have 提前。

42. Seldom ______ such a wonderful view of the universe.
A. we have seen
B. have we seen
C. we saw
D. did we see
答案：B。

seldom 位于句首，句子要用部分倒装，A、C 选项是正常语序，不符合，根据语境，这里要用现在完成时，所以选B。

43. Hardly ______ the spaceship lifted off when the crowd cheered.
A. had
B. did
C. was
D. when
答案：A。

Hardly...when...是固定句型，Hardly 位于句首，其后的句子要用过去完成时的部分倒装，所以选A。

44. No sooner ______ than the stars seemed brighter.
A. they entered the space
B. did they enter the space
C. had they entered the space
D. they had entered the space
答案：C。

No sooner...than...句型，No sooner 位于句首，其后的句子要用过去完成时的部分倒装，所以选C。

45. Only when we reach the space station ______ the true beauty of the universe.
A. we can see
B. can we see
C. we saw
D. did we see
答案：B。

“Only + 状语从句”位于句首，主句要用部分倒装，A、C 选项是正常语序，不符合，根据语境，这里要用一般现在时，所以选B。

46. It was on the moon that Neil Armstrong took the first step for mankind.
A. where
B. that
C. which
D. when
答案：B。

本题考查强调句。

强调句的结构是“It is/was + 被强调部分+ that + 其他部分”，本句强调的是地点“on the moon”，所以用
that 。

47. It was the spaceship Shenzhou V that made China's first manned space flight successful.
A. which
B. that
C. when
D. where
答案：B。

这是一个强调句，强调的是“the spaceship Shenzhou V”，强调句型为“It is/was + 被强调部分+ that + 其他部分”，所以用that 。

48. It was in 2003 that China sent its first astronaut into space.
A. which
B. when
C. that
D. where
答案：C。

此题为强调句，强调时间“in 2003”，强调句结构为“It is/was + 被强调部分+ that + 其他部分”，因此选that 。

49. It was the discovery of new planets that excited astronomers worldwide.
A. which
B. that
C. what
D. who
答案：B。

本题考查强调句，强调的是“the discovery of new planets”，强调句固定结构“It is/was + 被强调部分+ that + 其他部分”，应选that 。

50. It was through hard work and determination that scientists made significant progress in space exploration.
A. which
B. that
C. how
D. when
答案：B。

这是一个强调句，强调方式状语“through hard work and determination”，强调句的结构是“It is/was + 被强调部分+ that + 其他部分”，所以用that 。

51. Not only the astronauts but also the scientists ___ excited about the new discovery in space exploration.
A. is
B. are
C. was
D. were
答案：B。

本题考查主谓一致中的就近原则。

“not only...but also...”连接两个主语时，谓语动词的形式与靠近它的主语保持一致，本题中靠近谓语的主语是“the scientists”，为复数，且根据语境，时态为一般现在时，所以用“are”。

52. The number of experiments conducted in space ___ increasing every year.
A. is
B. are
C. was
D. were
答案：A。

“the number of...”表示“......的数量”，作主语时，谓语动词用单数形式，且根据“every year”可知，时态为一般现在时，所以用“is”。

53. A large amount of data on space exploration ___ collected so far.
A. has been
B. have been
C. was
D. were
答案：A。

“a large amount of...”修饰不可数名词，作主语时，谓语动词用单数形式。

“so far”是现在完成时的标志词，所以用“has been”。

54. The team of researchers working on the space project ___ made great progress.
A. has
B. have
C. is
D. are
答案：A。

“the team of...”表示“......的团队”，强调整体，作主语时，谓语动词用单数形式，“made great progress”表明是现在完成时，所以用“has”。

55. One third of the information about space exploration ___ updated regularly.
A. is
B. are
C. was
D. were
答案：A。

“分数+of+名词”作主语时，谓语动词的形式取决于名词的性质，“information”是不可数名词，谓语动词用单数形式，且根据语境，用一般现在时，所以用“is”。

56. A new spaceship __________ by our scientists last year.
A. was designed
B. designed
C. is designed
D. designs
答案：A。

本题考查一般过去时的被动语态。

last year 是一般过去时的时间标志，spaceship 与design 之间是被动关系，所以用一般过去时的被动语态was/were + 过去分词，A 选项符合。

57. The space equipment __________ carefully before being sent into space.
A. is checked
B. was checked
C. checks
D. checked
答案：B。

本题考查一般过去时的被动语态。

before 引导的时间状语从句，表示动作发生在过去，equipment 与check 是被动关系，要用被动语态，B 选项正确。

58. Many advanced instruments __________ for space exploration in recent years.
A. have been developed
B. were developed
C. are developed
D. will be developed
答案：A。

本题考查现在完成时的被动语态。

in recent years 是现在完成时的标志，instruments 与develop 是被动关系，要用现在完成时的被动语态have/has been + 过去分词，A 选项符合。

59. The satellite __________ successfully and is now working well.
A. was launched
B. is launched
C. has been launched
D. will be launched
答案：A。

本题考查一般过去时的被动语态。

根据“successfully and
is now working well”可知，卫星发射是过去的动作，且是被动的，A 选项正确。

60. Some special materials __________ to make the spacesuit more comfortable.
A. were used
B. are used
C. have been used
D. will be used
答案：A。

本题考查一般过去时的被动语态。

根据语境，描述过去的动作，materials 与use 是被动关系，A 选项恰当。

61. When in space, the astronauts communicate _____.
A. as simple as possible
B. as simply as possible
C. as simpler as possible
D. as simplest as possible
答案：B。

本题考查“as + 形容词/副词原级+ as possible”的用法，communicate 是动词，要用副词simply 修饰，A 选项simple 是形容词，C 选项simpler 是比较级，D 选项simplest 是最高级，均不符合语法规则。

62. If necessary, the spacecraft will change its route _____.
A. in time
B. on time
C. at times
D. all the time
答案：A。

本题考查短语辨析。

“If necessary”是省略句，“in time”表示及时，符合句意；“on time”按时；“at times”有时；“all the time”一直。

63. While exploring, they take notes _____.
A. carefully enough
B. enough carefully
C. careful enough
D. enough careful
答案：A。

enough 修饰形容词或副词时要后置，take notes 是动词短语，用副词carefully 修饰，B、D 选项位置错误，C 选项careful 是形容词，不符合语法。

64. Though tired, they keep working _____.
A. without stop
B. without stopping
C. with stop
D. with stopping
答案：B。

“Though tired”是省略句，“without”是介词，后接动名词，A 选项stop 是动词原形，C 选项with 表伴随，不符合句意，
D 选项with stopping 逻辑错误。

65. Unless told otherwise, they will continue the mission _____.
A. as planned
B. like planned
C. as planning
D. like planning
答案：A。

本题考查“as + 过去分词”的结构，“Unless told otherwise”是省略句，“as planned”表示按照计划，B 选项like 用法错误，C、D 选项planning 形式错误。

66. Let's explore the mysteries of space together, ______?
A. will you
B. shall we
C. don't we
D. do you
答案：B。

本题考查祈使句的反意疑问句。

Let's 开头的祈使句，其反意疑问句用shall we。

67. Keep quiet in the spaceship, ______?
A. will you
B. won't you
C. do you
D. don't you
答案：A。

本题考查祈使句的反意疑问句。

Keep 开头的祈使句，其反意疑问句用will you。

68. Don't touch the equipment in the space station, ______?
A. will you
B. do you
C. won't you
D. don't you
答案：A。

本题考查祈使句的反意疑问句。

Don't 开头的祈使句，其反意疑问句用will you。

69. Follow the instructions during the space mission, ______?
A. will you
B. won't you
C. do you
D. don't you
答案：A。

本题考查祈使句的反意疑问句。

Follow 开头的祈使句，其反意疑问句用will you。

70. Open the hatch carefully when entering the spaceship, ______?
A. will you
B. won't you
C. do you
D. don't you
答案：A。

本题考查祈使句的反意疑问句。

Open 开头的祈使句，其反意疑问句用will you。

71. They are discussing ______ the data collected from the space experiment is reliable.
B. if
C. what
D. how
答案：B。

本题考查宾语从句的引导词。

“discuss”后接宾语从句，根据句意“他们正在讨论从太空实验收集的数据是否可靠”，“if”表示“是否”，符合语境。

A 选项“that”在宾语从句中不充当成分，无意义；
C 选项“what”在从句中充当主语、宾语等成分，此处不符合；
D 选项“how”表示“如何”，与句意不符。

72. The scientists wonder ______ the new equipment can improve the accuracy of data collection in space.
A. that
B. whether
C. what
D. which
答案：B。

此题考查宾语从句引导词。

“wonder”后接宾语从句，根据句意“科学家们想知道新设备是否能提高在太空中数据收集的准确性”，“whether”表示“是否”，A 选项“that”无意义，不符合；C 选项“what”在从句中充当成分，此处不需要；D 选项“which”表示“哪一个”，不符合句意。

73. We need to figure out ______ these samples from the space are valuable for research.
B. if
C. what
D. why
答案：B。

本题考查宾语从句引导词。

“figure out”后接宾语从句，根据句意“我们需要弄清楚这些来自太空的样本是否对研究有价值”，“if”表示“是否”，A 选项“that”不表示“是否”；C 选项“what”在从句中充当成分，此处不需要；D 选项“why”表示“为什么”，不符合语境。

74. The astronauts are not sure ______ they can complete the mission on time.
A. that
B. whether
C. what
D. how
答案：B。

此题为宾语从句引导词的考查。

“be not sure”后接宾语从句，结合句意“宇航员不确定他们是否能按时完成任务”，“whether”表示“是否”，A 选项“that”不符合句意；C 选项“what”在从句中充当成分，这里不需要；D 选项“how”表示“如何”，不符合此处语境。

75. The researchers are exploring ______ the information obtained from the space exploration can be applied to daily life.
A. that
B. if
D. how
答案：D。

本题考查宾语从句引导词。

根据句意“研究人员正在探索从太空探索中获得的信息如何能应用于日常生活”，“how”表示“如何”，A 选项“that”无意义；B 选项“if”表示“是否”，不符合；C 选项“what”在从句中充当成分，此处不需要。

76. The spaceship traveled faster and faster ___ it left the Earth's atmosphere.
A. when
B. while
C. as
D. until
答案：C。

本题考查状语从句的连接词。

“as”在这里表示“随着”，强调动作的同时发生，随着飞船离开地球大气层，它飞得越来越快。

A 选项“when”表示“当……时候”，
B 选项“while”强调动作的同时性且通常接延续性动词，D 选项“until”表示“直到……”，均不符合语境。

77. The astronauts calculated the time ___ they would reach the destination accurately.
A. before
B. after
C. since
D. as soon as
答案：A。

本题考查时间状语从句。

“before”表示“在……之前”，宇航员准确地计算出他们到达目的地之前的时间。

B 选项“after”表示“在……之后”，C 选项“since”表示“自从”，D 选项“as soon as”表示“一……就……”，都不符合句意。

78. ___ the spaceship was in orbit, it collected a lot of valuable data.
A. While
B. When
C. Before
D. After
答案：A。

“While”强调在某个时间段内，“当宇宙飞船在轨道上时，收集了很多有价值的数据”。

“When”侧重时间点，“Before”表示在……之前，“After”表示在……之后，均不符合此语境。

79. The satellite continued to send signals ___ it was out of control.
A. even though
B. as if
C. so that
D. as long as
答案：A。

本题考查让步状语从句。

“even though”表示“即使”，即使卫星失控了，仍继续发送信号。

B 选项“as if”表示“好像”，C 选项“so that”表示“以便”，D 选项“as long as”表示“只要”，均不符合题意。

80. The spaceship changed its course ___ it encountered some space debris.
A. as soon as
B. because
C. so that
D. in case
答案：B。

本题考查原因状语从句。

“because”表示“因为”，因为遇到了一些太空碎片，所以飞船改变了航线。

A 选项“as soon as”表示“一……就……”，C 选项“so that”表示“以便”，D 选项“in case”表示“以防”，均不符合句意。