题目内容
I don’t know whether you happen ____ it, but I’m going to study in the U.S.A. this September.
A. to be heard B. to be hearing C. to hear D. to have heard
D
解析:
happen to have done sth 为不定式的完成时, 表示一个已经完成了的动作,强调对于现在的影响.
练习册系列答案
相关题目