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Whyareyouhere?Youaresupposedto

練習題1.75W

問題詳情:

Whyareyouhere?Youaresupposedto

Why are you here? You are supposed to ________ the experiment in the lab.

A. perform  B. be performing  C. have performed  D. be performed

【回答】

B

知識點:非謂語動詞

題型:選擇題

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