She is a diligent student and all her spare time she hasstaying in the libraryA. is spen

问题补充：

She is a diligent student, and all her spare time she hasstaying 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

解析：考察定语从句。本句中定语从句省略that，句中主语her spare time为抽象名词，不可数，故谓语动词用单数。选A，她有的所有的空闲时间都花在泡图书馆了。