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I will have begun to do the work 3 o’clock this afternoon.A.byB.atC.afterD.befor

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I will have begun to do the work 3 o’clock this afternoon.A.byB.atC.afterD.befor

I will have begun to do the work ______ 3 o’clock this afternoon.

A.by

B.at

C.after

D.before

试题答案

A

句中will have begun提供了一个关键的解题线索,表明应该表示“将来截止时间”的介词,在本题中只有by有这种用法。