2. you ever to keep our environment clean?

   A. Did;help   B. Will;help

   C. Are;helping   D. Have;helped

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4. Have you ever (say) something that you didn't want (say) ?

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6. We wonder robots will make humans lose their jobs or not.

   A. that   B. whether

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They haven’t decided they will go to London Berlin.

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I many times.

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1. Amy loves to talk about travel,and she many places of interest.

   A. has gone to   B. has been to

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 has he learned to play the guitar?

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I have had the book for 10 years.

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