题目内容
I don’t know whether you happen ________, but I’m going to study in the USA this September.
[ ]
A.
to be heard
B.
to be hearing
C.
to hear
D.
to have heard
答案:D
解析:
解析:
|
happen to do sth.表示“碰巧做某事”。表示不定式的动作先于谓语动词发生或应该已经发生时,用不定式的完成式。 |
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