题目内容

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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The group is made up____five students. And they are studying hard to make up____ the lost time.

A. of,of
B. for,for
C. of,for
D. for,of

The PLA man saved the boy ____ death.

A. of
B. from
C. to
D. on

He will come ____ three days.

A. before
B. after
C. in
D. later

He went to Beijing and returned ____ three days.

A. in
B. before
C. later
D. after

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