2017_2018学年高中英语Module6UnexplainedMysteriesofNaturalSectionⅡGrammar课时作业外研版必修4

Module 6 Unexplained Mysteries of Natural Section Ⅱ Grammar Ⅰ.用下列情态动词完成句子

1．Mr White ________ have arrived at 8：30 for the meeting, but he didn't turn up.

2．—Tom, I have cleaned the room for you.

—Thanks. You ________ not have done it. I can manage it.

3．He ________ not have been more than 20 years old, because he just graduated from school.

4．He ________ have finished his work, but I'm not sure.

5．I ________ have come to the party yesterday, but I had an unexpected visitor.

6．He ________have completed his work; otherwise, he wouldn't be enjoying himself by the seaside.

答案：1.should 2.need 3.can 4.may/might

5．would 6.must

Ⅱ.用括号内所给动词的适当形式填空

1．You should ________ (hand in) your composition yesterday.

2．The dinosaurs may ________ (stop) evolving already.

3．He may ________ (come) soon; I'm not sure.

4．There must ________ (be) dinosaurs today living in other galaxies.

5．In the past a huge meteorite might ________ (hit) all the dinosaurs.

6．You must ________ (know) everything now.

7．It can't ________ (be) him; he doesn't wear glasses.

8．If only I ________ (follow) your advice.

9．He suggested that the meeting should not ________ (put off)．

答案：1.have handed in 2.have stopped e

4．be 5.have hit 6.have known 7.be 8.had followed 9.be put off

Ⅲ.单句改错

1．—What do you suppose has happened to him?

—I don't know. He should have got lost.

_________________________________________________

2．—Jerry doesn't mind lending you his bike.

—He couldn't. I have borrowed Mary's.

___________________________________________________

3．If he had been here, he can have given us some help.

____________________________________________________

4．I didn't hear the phone. I should have been asleep.

_____________________________________________________

5．He knew nothing about the book. He mustn't have read it before.

_____________________________________________________

6．Liu Dong was in Jinan yesterday，so he shouldn't have come.

___________________________________________________

7．—Did Mary come to the party?

—I don't know. She must have come while I was out.

______________________________________________________

8．He can have finished his work; otherwise, he wouldn't be enjoying music in his study.

______________________________________________________

9．She is two hours late. What may happen to her?

______________________________________________________

10．Everyone in my class passed the exam. It mustn't have been difficult.

_____________________________________________________

答案：1.should→may/might 2.couldn't→needn't

3．can→could/might/would 4.sh ould→must

5．mustn't→couldn't 6.shouldn't→couldn't

7．must→may/might8.can→must

9．may happen→can have happened

10．mustn't→can't

Ⅳ.完形填空

It was July 1976. An unmanned spaceship, Viking One, had arrived at Mars. On July 20th, the spaceship __1__. Part of it continued toward a landing on the planet. It fell __2__ through the late afternoon Mars' sky.

Forty kilometers above the planet, the thin __3__ began to slow its fall. Six kilometers above the planet a big parachute(降落伞) opened. The landing craft fell more slowly. Then, three rocket engines __4__. And the landing craft set down __5__ on the surface. __6__ in the Viking One Lander immediately sent a message to the earth. It said, “I am here. I am down safely. I am beginning my work.”

The message __7__ at the speed of light. It took twenty minutes to reach the earth, more than three hundred and twenty million kilometers __8__. Scientists and engineers at the control center __9__.

Moments later, television receiver in the control center began to __10__ the first picture from Viking One. People at the center could see the feet of the landing craft sitting firmly on the __11__ soil of Mars. Those pictures were our first __12__ look at the planet. They showed a red surface, full of rocks, with no sign of __13__. It was our first look at a planet that is full of surprises, mysteries and promise. Viking One was launched toward Mars in August, 1975. The spaceship had two __14__：an orbiter(轨道飞行器) and a lander(着陆器). The orbiter would circle __15__ Mars. It would take pictures of Mars' surface. It would __16__ the atmosphere.

The __17__ would go down to the surface. It would carry __18__ to dig up and study soil and __19__.

It also would report about any evidence of life on the planet. The lander would send this __20__ to the orbiter and then back to the earth.

1．A. separated B. appeared

C. worked

D. started

2．A. correctly B. slowly

C. quickly

D. directly

3．A. air B. universe

C. space

D. atmosphere

4．A. fired B. fell

C. opened

D. floated

5．A. heavily B. softly

C. suddenly

D. immediately

6．A. A computer B. A rocket

C. A pilot

D. An astronaut

7．A. spread B. traveled

C. shot

D. moved

8．A. far B. long

C. distant

D. away

9．A. shouted B. watched

C. cheered

D. welcomed