问题描述：
英语选择题---非谓语动词部分
...what has made her so sad?...____in the physics examination.
A.Failed B.Since she failed C.Failing D.Because of failing
可是C怎么也说不通啊 后面也不成一句话呀.为什么?请讲下原因!=)
...what has made her so sad?...____in the physics examination.
A.Failed B.Since she failed C.Failing D.Because of failing
可是C怎么也说不通啊 后面也不成一句话呀.为什么?请讲下原因!=)
问题解答：
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