【題目】Once a programme put into a computer, it accordingly.

A. is; acts B. is being; is acting

C. has been; will act D. will be; acts

【答案】C

【解析】

句意：一旦程序被輸入電腦，它就會采取相應的行動。考查動詞時態(tài)辨析題。時間狀語從句或者條件狀語從句中用一般現(xiàn)在時或現(xiàn)在完成時，主句用一般將來時。once一旦，表條件；根據(jù)句意結構，可知選C。

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