2.Jack always works hard and does well in his lesson.How ____it be that he failed the exam?
2.Jack always works hard and does well in his lesson.How ____it be that he failed the exam?
A.could B.might C.should D.must
A.could B.might C.should D.must
英语人气：678 ℃时间：2019-08-22 14:11:55
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c
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