高中英语Unit3ComputersPeriod4课时作业新人教版必修2

Period Four Grammar & WritingⅠ.用所给词的适当形式填空1．Many new houses ________________________(build) in the past few years.2．So far no letter ________________________(receive) from my friends.3．The room ________ already ________________(clean)，hasn’t it?4．Much useful information about planets ________________________(collect) since 1971.5．The temple ________________________ (repair) since last year.6．________ the book ________________ (publish) yet?7．You can see the house ________________________(not paint) for years.8．—We want to sit at the table near the window.—I’m sorry，but it ________________________(take) already.Ⅱ.单项填空1．Every year a flood of farmers arrive in Shenzhen for the money­making jobs they________before leaving their hometowns.A．promised B．were promisedC．have promised D．have been promised2．His sister left home in 1998，and ________ since.A．had not been heard of B．has not been heard ofC．had not heard of D．has not heard of3．—Why does the lake smell terrible?—Because the water ________.A．was polluted B．pollutedC．is polluting D．has been polluted4．I like these English songs and they ________ many times on the radio.A．taught B．have taughtC．are taught D．have been taught5．I can’t see any coffee in this cupboard.______？A．Has it all been finished B．Was it all finishedC．Has it all finished D．Did it all finish6．Great changes ________ in the city，and a lot of factories ________ in the past five years.A．have been taken place；have been set upB．have taken place；have been set upC．have taken place；have set upD．have been taken place；have set up7．All the preparations for the project ________，and we’re ready to start.A．completed B．had been completedC．complete D．have been completed8．—What happened to the postman?—I don’t know.He ________ around here for a long time.A．hasn’t seen B．didn’t seeC．wasn’t seen D．hasn’t been seen9．How many suggestions ________ to you so far?A．has given B．were givenC．have been given D．have given10．Professor James will give us a lecture on the Western culture，but when and where ________ yet.A．hasn’t been decided B．haven’t decidedC．isn’t being decided D．aren’t decided11．—How long ________ as an editor?—Since 2002.A．were you employedB．have you been employedC．had you been employedD．will you be employed12．Bamboo ________ to make houses in South China for thousands of years.A．has been used B．was usedC．had been used D．used13．Every possible means ________ to save the wounded soldier up to now.A．was tried B．were triedC．have been tried D．has been tried14．—The dinner was delicious!—I agree.I am so full.—That’s too bad.But some dessert ________.A．has orderedB．will be orderedC．has been orderedD．was going to be ordered15．—How many times ________ not to play with fire?—I’m sorry.I’ll never do that again.A．do you tell B．had you toldC．are you told D．have you been toldⅢ.把下列句子改为被动语态或主动语态1．He has given the child some interesting books.(1)________________________________________________________________________(2)________________________________________________________________________2．He has repaired the machine for two hours.________________________________________________________________________ 3．She has already returned this book to the library.________________________________________________________________________ 4．I have made him work hard.________________________________________________________________________ 5．We have planted many trees on the hill in the last five years.________________________________________________________________________ 6．The table has been painted green by his father.________________________________________________________________________ 7．The teacher has been asked to explain the sentence twice by some students.________________________________________________________________________________________________________________________________________________ 8．This matter has been talked about recently.________________________________________________________________________ Ⅳ.阅读理解Every year when the Italian artist Michelangelo’s (1475～1564) birthday comes around，computer users all over the world are filled with fear and use their computers with care.Some may even choose not to turn on their computers on March 3rd.All this fear and care are just because a deadly computer virus(病毒) is ready to cause damages on that day.What’s a computer virus then？Why do people get so afraid of it?A computer virus is，in fact，a little program that is put into other programs and that does something bad.It is called a virus because，like any real­life viruses such as AIDS virus(艾滋病毒)，it reproduces(繁殖) itself.And when these programs are run，the virus is brought to life.It hides itself in your computer system waiting for the right moment to make damages.And at the same time it keeps producing itself by copying itself onto other programs.The Michelangelo virus waits until the artist’s birthday comes around，and then it will wake up to do very bad things like destroying your files.So next time when you turn on your computer，look out for computer viruses!1．The Italian artist Michelangelo ________.A．was born six centuries agoB．was born on March 3rd,1475C．died six centuries agoD．died on March 3rd,15642．Why are computer users full of fear on March 3rd？Because ________.A．it is the birthday of a famous Italian artistB．a kind of computer virus will come on that dayC．a deadly computer virus called “the Michelangelo virus”will wake up and then cause damages to computers on that dayD．something will easily go wrong with computers3．In fact，a computer virus is ________.A．a program which can be put into computers with some damages to themB．a kind of real­life virusC．a kind of virus like AIDS virusD．a kind of program which is placed into other programs and which makes damages 4．In fact，a computer virus is ready to cause damages ________.A．any dayB．only on March 3rdC．on FridaysD．only on some famous artists’ birthd aysⅤ.书面表达假设你叫李华，老师让你们想象未来的汽车是什么样子，根据下面的内容写一篇短文。