It happened ____ the Long March.
A. during
B. in
C. at
D. for
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We go to school ____ a bike.
A. in
B. on
C. by
D. ove
It's very kind____ you to repair the bike ____ me.
A. for.for
B. of,of
C. of,for
D. for,of
Fresh air is good ____ your health.
A. at
B. for
C. of
D. to
The boy is waiting ____ his sister and they will go to the hospital to wait ____ their sick mother.
A. for,on
B. on,for
C. for,for
D. on.on
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