While he_____ on the phone, a man walked into his room.
#39822
A
was talking
B
talked
C
is talking
D
talk
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－Why not go to see the dolphin show with me?－Because I _______ it.
#41879
A
saw
B
will see
C
see
D
have seen
He has already gone home. But before he left, he__________ all the mistakes in his translation.
#36724
A
had corrected
B
has corrected
C
corrected
D
would correct
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