as Jack finished his homework yet?I’ve no idea,But he ___it

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as Jack finished his homework yet?I’ve no idea,But he ___it the whole afternoon
一道英语选择题18.as Jack finished his homework yet?
I’ve no idea,But he ___it the whole afternoon.
A.would do B.was doing C.did D.had done

A和C明显是不行的,因为后面有时间段
D的时态错了,如果是has done就可以

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