3.3 课时作业
Ⅰ.用括号内所给动词的适当形式填空
1．With the help of high technology, more and more new substances ________ (discover) in the past 50 years.
2．The construction of the new bridge ________ (complete) by now. 3．She ________ (laugh) at by her classmates since she was young. 4．Every possible means ________ (try) to save the wild animals up to now. 5．How many suggestions ________ (give) to you so far? 6．The plans ________ (study) by the experts for four times.
7．This is the second time that he ________ (praise) by his teachers this week. 8．Much of its traditional folk culture ________ (keep) alive ever since it was born. 9．A lot ________ (do) in the recovery of national economy in the past few years. 10．Students are told to make sure that the windows ________ (close) before leaving the classroom.
答案：1.have been discovered 2.has been completed 3．has been laughed 4.has been tried 5．have been given 6.have been studied 7．has been praised 8.has been kept 9．has been done 10.have been closed Ⅱ.将下列句子改为被动语态
1．They have put the computer into a robot.
________________________________________________________________________ 2．We have finished the work now.
________________________________________________________________________ 3．He has given the child some interesting books.
________________________________________________________________________ 4．Have they returned the book yet?
________________________________________________________________________ 5．Over time, people have changed me a lot.
________________________________________________________________________ 6．A new virus has attacked my computer.
________________________________________________________________________ 7．I have made him study hard.
________________________________________________________________________ 8．Have you found ways to make waste water clean?
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________________________________________________________________________ 答案：
1．The computer has been put into a robot by them. 2．The work has been finished by us now.
3．The child has been given some interesting books by him./Some interesting books have been given to the child by him.
4．Has the book been returned by them yet? 5．Over time, I have been changed a lot by people. 6．My computer has been attacked by a new virus. 7．He has been made to study hard by me.
8．Have ways been found to make waste water clean (by you)? Ⅲ.完成句子
1．这个贼已经被逮住了。 The thief __________________. 2．这些狗受了虐待。
The dogs __________________ badly. 3．他的作业已经完成。
His homework __________ already ____________. 4．他发生了糟糕的事情。
Something bad ________________ to him. 5．王先生已经把我介绍给了史密斯先生。 ________________ to Mr. Smith by Mr. Wang. 6．在我们国家熊猫已经得到保护了吗？
__________ pandas __________________ in our country? 7．谁已经得到了这种新计算机的帮助？ Who ________________ by the new computer? 8．汤姆已经买了什么东西？ What ________________ by Tom?
答案： 1.has been caught 2.have been treated 3．has; been finished 4.has happened
5．I have been introduced 6.Have; been protected 7．have been helped 8.has been bought Ⅳ.阅读理解
The most frightening words in the English language are, “Our computer is down.” You hear it more and more as you go about trying to conduct your business.
The other day I was at the airport attempting to buy a ticket to Washington and the attendant said, “I'm sorry; I can't sell you a ticket. Our computer is down.”
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“What do you mean your computer is down? Is it depressed？” “No, it can't be depressed. That's why it's down.” “So if your computer is down, just write me out a ticket.”
“I can't write you out a ticket. The computer is the only one allowed to do so.”
I looked down on the computer and every passenger was just standing there drinking coffee and staring at the black screen. Then I asked her, “What do all you people do？”
“We give the computer the information about your trip, and then it tells us whether you can fly with us or not.”
“So when it goes down, you go down with it.” “That's good, sir.”
“How long will the computer be down？” I wanted to know.
“I have no idea. Sometimes it's down for 10 minutes, sometimes for two hours. There's no way we can find out without asking the computer, and since it's down, it won't answer us.”
After the girl told me they had no backup (备用) computer, I said, “Let's forget the computer. What about your planes? They're still flying, aren't they？”
“I couldn't tell without asking the computer.”
“Maybe I could just go to the gate and ask the pilot if he's flying to Washington，” I suggested.
“I wouldn't know what gate to send you to. Even if the pilot was going to Washington, he couldn't take you if you didn't have a ticket.”
“Is there any other airline flying to Washington within the next few hours？”
“I wouldn't know，” she said, pointing at the dark screen. “Only ‘IT’ knows. ‘IT’ can't tell me.”
By this time there were quite a few people standing in lines. The word soon spread to other travellers that the computer was down. Some people went white, some people started to cry and still others kicked their luggage.
1．The best title for the article is “________”． A．The Computer Is Down B．The Most Frightening Words C．The Computer of the Airport D．Asking the Computer
2．What could the girl in the ticket office do for the passengers without asking the computer? A．She could sell a ticket. B．She could write out a ticket.
C．She could answer the passengers' questions. D．She could do nothing.
3．Why do you think they had not a backup computer?
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A．Because it was easily down. B．Because it was very expensive. C．Because it was not advanced enough.
D．Because it was not as big as the main computer. 4．The last paragraph suggests that ________. A．a modern computer won't be down B．computers can take the place of humans
C．sometimes a computer may bring suffering to people D. there will be great changes in computers 答案与解析：
1．解析：标题归纳题。根据文章第一句中的“Our computer is down”及后面的文章内容，可知此题答案为A。
答案：A
2．解析：细节理解题。根据文章中的对话：售票员不能卖机票，回答不出旅客提出的问题等，可推知答案为D。
答案：D
3．解析：推理判断题。比较各选项，根据生活经验对之进行判断，得出此题的答案为B。 答案：B
4．解析：推理判断题。根据文章最后一段的描述：电脑死机，旅客们感到恐惧、忧郁、不安，从而可推知答案为C。
答案：C Ⅴ.短文改错
Edison was a great scientist or inventor. As may not be known to many people，born in a peasant families, he received few school education. He started to go to school at age of eight and remain at school for only three months. It's said that he always asked some strange questions which his teachers couldn't answer them. In fact，he was a man full with imagination. He made over 2,000 inventions in his life, covered many fields, such as the electric lamp, film, etc. He made an important contribution for the whole world, the social develop and the progress of human beings.
答案：
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