单项选择题

We must cherish experience () at the cost of blood.

A. enquired
B. inquired
C. acquired
D. required

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单项选择题

Hardly had he finished his speech （） the audience started cheering.

A. then
B. when
C. than
D. as

单项选择题

There is () that well-educated citizens should devote their knowledge and skills to their own country and people.

A. no deny
B. no denying
C. not deny
D. not denied

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