Willpower is a kind of quality is it takes to do anything well.A. that; whichB. which;

问题补充：

Willpower is a kind of quality, is it takes to do anything well.

A. that; which

B. which; what

C. that; that

D. which; which

答案：

A. that; which

(答案→)B. which; what

C. that; that

D. which; which

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