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To make us healthier, the teachers often see us ______ on the playground.
#49764
A
took exercise
B
take exercise
C
take exercising
D
to take exercise
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 Why not________your teacher for help when you can’t finish ________it by yourself?
#49455
A
ask,write
B
to ask,writing
C
ask,writing
D
asking,write
I’m surprised _______ my old friends in the street.
#48831
A
see
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seeing
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Be careful    _   too fast, or there    _   be an accident.
#50111
A
not to drive; must
B
to not drive; may
C
not drive; must
D
not to drive; may
Tony is busy _______ his homework.
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A
doing
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do
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does
It’s your job________ the pop stars.
#50626
A
introduce
B
introducing
C
introduces
D
to introduce