I bought three books but none of is interesting.A. whichB. thatC. whatD. them

问题补充：

I bought three books, but none of is interesting.

A. which

B. that

C. what

D. them

答案：

A. which

B. that

C. what

(答案→)D. them

解析：这题考查并列句的用法：but连接两个并列分句，所以but后面是简单句，答案是D。them指代the books，句意是我买了三本书 ，但是没有一本是有趣的。选D。