题目内容

The PLA man saved the boy ____ death.

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

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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

He will return____ three o'clock.

A. after
B. in
C. on
D. at

He wrote the article ____ three days.

A. at
B. in
C. on
D. by

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