题目内容

The window is never opened ____ in summer.

A. but
B. except
C. except for
D. but for

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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

Fresh air is good ____ your health.

A. at
B. for
C. of
D. to