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精英家教網 > 高中英語 > 題目詳情

A computer can only do ________ you have instructed it to do.

A. how          B. after           C. what            D. when

C


解析:

本題考查的是名詞性從句作賓語的用法。此句的引導詞既作連詞又在賓語從句中充當一成分,故what最合適。

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