She is a diligent student and all her spare time she has staying in the library.A. is sp

问题补充：

She is a diligent student, and all her spare time she has staying in the library.

A. is spent

B. spent

C. to spend

D. to be spent

答案：

(答案→)A. is spent

B. spent

C. to spend

D. to be spent

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