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A computer can only do _________ you have instructed it to do. A. how B. after C. what D. when

回复(4) 2008-12-07 01:14 来自版块 -

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: lihanhui：c instruct sth. to do sth. 从句中缺少"to do sth." 的sth. 用what来代替(2008-12-07 10:24)

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: ygt2000zjy：you have instructed it to do,do后面缺宾语,所以因该用what,这是宾语从句(2008-12-07 07:53)

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