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35.-I have got a headache.

     - No wonder.You __    in front of that computer too long.

     A.work                   B.are working

     C.have been working                    D.worked

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34.The expert insisted that silkworms were first raised by a woman in _____ is now Hebei Province.

     A.which            B.that            C.where         D.what

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33.My grandfather is as __   _ as a young man and hates sitting around doing nothing all day.

     A.enthusiastic                         B.energetic        C.talkative    D.sensitive

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32.-I am afraid the task is too difficult for me, sir.

     -_____, Linda.Just believe in yourself!

     A.No problem                       B.That's all right

     C.That's OK                          D.Come on

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