______the programme,they have to stay there for another two weeks.”
A.Not completing B.Not completerd C.Not having completed D.Having not completed
为什么?
人气：408 ℃ 时间：2019-08-20 19:04:24
解答
have completed表示还没做完,用完成时
由于作状语,所以改成现在分词形式,即having completed
改成否定,就是Not having completed
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