Chinese students usually spend the students of the US studying in their free time.A. twic

问题补充：

Chinese students usually spend the students of the US studying in their free time.

A. twice as many hours as

B. as twice many hours as

C. twice hours as many as

D. as many as twice hours

答案：

(答案→)A. twice as many hours as

B. as twice many hours as

C. twice hours as many as

D. as many as twice hours

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