3. 離開前一定要切斷電源。

Be sure to      the electricity before you leave.

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(   ) 4. It's      for us to finish the work in a day. We need at least three days.

A. natural    B. excellent

C. cruel    D. impossible

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  These days, it is easier for us to travel to other countries than before. However, we must face a big1 Most of us can't 2with the people in other countries. In many places, English is still not spoken, 3 it is the most widely used language. So it would be 4 if there were one language. It could be understood by anyone anywhere in the world.

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  In short, Esperanto should be attractive as a language to learn，but there is a problem：How
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      C. meeting    D. programme

(   ) 2. A. write    B. read

       C. communicate    D. play
(   ) 3. A. so    B. though

     C. if    D. because

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      C. second    D. last

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       C. rules    D. lessons

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(   ) 4. The little boy doesn't speak      his brother, but his written work is very good.

A. so well as    B. so better as 

C. as good as    D. so better as

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(   ) 5. —Do you think fresh water can       on earth one day?

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(   ) 6. You      read in the sun. It's bad for your eyes.

A. not ought to    B. ought to

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3. Work hard. You can finish your homework in two hours.(合并為一句)

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3. ―How long will you              (需要)to finish the work? —About three days.

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5. I can't find my wallet though I havelooked for it everywhere.(同義句轉(zhuǎn)換)

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