急.怎么判断!With his son,____ ,the old man felt unhappy .A.to disappoint B.to be disappointed C.disappointing D.being disappointed 为什么那么选啊?不定式和动名词在用法上有什么区别吗?
问题描述:
急.怎么判断!
With his son,____ ,the old man felt unhappy .
A.to disappoint B.to be disappointed C.disappointing D.being disappointed
为什么那么选啊?不定式和动名词在用法上有什么区别吗?
答