题目内容

After the old soldier returned home, he never referred________hismiserable memory in prison.

A. to
B. with
C. upon
D. down

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You are welcome to ________by at any time.

A. pass
B. drop
C. take
D. get

The two countries have to carry _______with the negotiation next week.

A. on
B. out
C. up
D. into

Witnesses backed________from the bloody scene of the accident.

A. off
B. away
C. into
D. upon

Many great linguists have ________ most of their time and energy to the scientific study of language.

A. spent
B. saved
C. devoted
D. cost

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