The window is never opened ____ in summer.
A. but
B. except
C. except for
D. but for
It happened ____ the Long March.
A. during
B. in
C. at
D. for
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
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