While he ________ his homework , his mother came in.
#41781
A
does
B
did
C
was doing
D
do
推荐题目
—China develops so fast.— That’s true. It ______ a lot already.
#40170
A
changes
B
changed
C
will change.
D
has changed.
Children _______ sit in the front seat of a car. It’s too dangerous.
#36775
A
need
B
needn’t
C
must
D
mustn’t
–Why didn’t you go to the movie last night?_ Because I _____ the film before..
#40405
A
was seeing
B
saw
C
have seen
D
had seen
—What has happened in your hometown?— Great changes _____ in my hometown recently.
#41510
A
have been taken place
B
have taken place
C
have been happened
D
was happened