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 I study math by ____ lots of exercises.
#49928
A
did
B
doing
C
do
D
does
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It’s your job________ the pop stars.
#50626
A
introduce
B
introducing
C
introduces
D
to introduce
My  teacher asked her       late for school again.
#49557
A
not to be
B
not be
C
don’t be
D
to be not
They promised        your minds        , or you will get your money back.
#50255
A
change; successful
B
to change; successful
C
change; successfully
D
to change; successfully
 Nobody knew who was the first ________ at school that morning when the window was broken.
#50643
A
arriving
B
arrived
C
to arrive
D
have arrived
Father has had the computer _________. Now it works very well.
#49759
A
repair
B
repairing
C
to be repaired
D
repaired