单项选择题

It's bad policy for developing countries to sacrifice environmental protection to () economic growth.

A. discourage
B. weaken
C. promote
D. create

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On most of the nights. Jane () reading letters from her...

单项选择题On most of the nights. Jane () reading letters from her boyfriend.

A. stayed off
B. stayed on
C. stayed out
D. stayed up

It is difficult ()a world record and even more difficul...

单项选择题It is difficult ()a world record and even more difficult to () it.

A. keeping, set
B. keep, set
C. set, keep
D. to set, keep

He raised his arms to ()his face from the blow.A. prote...

单项选择题He raised his arms to ()his face from the blow.

A. protest
B. protect
C. prevent
D. keep