I don't know whether you happen （ ）,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

I don't know whether you happen （ ）,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
I don't know whether you happen （ ）,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

I don't know whether you happen （ ）,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 我不知道你是否碰巧听到了,但是9月我将去美国学习.完成时.