I’d like to have visited the Palace Museum, but something unexpected _______ to my father.
#103390
A
had happened
B
happened
C
has happened
D
happens
推荐题目
These days, we _____ for our final exams.
#102111
A
are prepared
B
have prepared
C
are preparing
D
will prepare
I would have come earlier, but I ________ that you were waiting for me. 
#102416
A
hadn’t known
B
didn’t know
C
would have known
D
haven’t know