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We are all tired and we must stop ________.

A. work

B. to work

C. working

D. works

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We are all busy taking about and using the Internet. But how many of us know the history of the Internet?

Many people are surprised when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn’t work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information could be sent through another part. In this way, computer network system would keep on working all the time.

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The Internet has now become one of the most important parts of people’s life.

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B．In the early 1970s, the Internet was easy to use.

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D．Today it is still not easy to get on-line.

 

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請根據句意從方框中選擇合適的單詞并用其適當形式填空，使句子通順。

choose  come  twelve  it   success

1. Nobody came close to the door, so the door seemed to close by _________ .

2.Without the help of our teacher, we did the experiment ___________ .

3.We are all busy getting ready for the _________ exams these days.

4.The traffic stopped, and he had no ______ but to walk home.

5.I hope to see you at my ________ birthday party.

請根據句意從方框中選擇合適的動詞并用其適當時態(tài)填空，使句子通順。

show  visit  save  prefer   wait

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   ----Oh, I _________ for my uncle at the airport.

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   ----That’s  right .  She ________ it three times since she came here.

9.I wonder how to use the washing machine.

   That’s easy.  I ___________ you later.

10. My sister ________ red to black when she was young .

 

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