单项选择题

In order to improve our standard of living, we have to accelerate production.

A. decrease
B. stop
C. step up
D. control
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单项选择题
The director often says it is difficult to design a program that will meet the diverse needs of all our users.
A. vailous
B. different
C. versatile
D. distinguished
单项选择题
He is so advisable that he always deposits some extra money for emergency.
A. clever
B. foolish
C. wise
D. sensitive
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