单项选择题

To achieve sustainable development, the () of resources is assuming new importance.

A. conservation
B. reservation
C. exhaustion
D. devastation

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单项选择题
The sale of alcoholic beverages is () to those above 21 in some regions.

A.confined
B. inhibited
C. obliged
D. restricted
单项选择题
A high official is likely to win respect and trust if he can stick to his principles.()

A.turn to
B. add to
C. keep to
D. lead to
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