Question

I don’t know whether you happen ______ ,but I’m going to study in the U．S．this September

1. A.
   to be heard
2. B.
   to be hearing
3. C.
   to hear
4. D.
   to have heard

Answer 1

D
本题考查不定式的时态辨析。句意为“我不知你是否已听说了……”, 要体现不定式的动作先于谓语动词发生或者应该已发生, 不定式要用完成形式。