Look, so many people are running out of the station. I wonder what ________.
#36284
A
is happened
B
was happening
C
is happening
D
had happened
推荐题目
I didn’t hear your call because I ______ to music at that time.
#39503
A
listen
B
will listen
C
am listening
D
was listening
My dad __________ Singapore for a meeting. He ________ there twice.
#39807
A
has gone to, has been to
B
has been to, has gone to
C
has gone to, has been
D
has been to, has gone