D
(what do you think) make Mary so sad.
问句中提问部分是做主语,所以回答句选D,动名词做主语.
what do you think make Mary so sad?___in the exam ,i think
what do you think make Mary so sad?___in the exam ,i think
A.as she failed B.because of her failing C.failed D.failing
A.as she failed B.because of her failing C.failed D.failing
英语人气：120 ℃时间：2019-08-20 02:49:02
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