-- ?--They are my books.A. What are thoseB. What is thatC. What is thoseD. What is this

问题补充：

-- ?

--They are my books.

A. What are those

B. What is that

C. What is those

D. What is this

答案：

(答案→)A. What are those

B. What is that

C. What is those

D. What is this

解析：根据答语的意思他们是我的书，可知是在询问“那些是什么?”。可排除B和D，C搭配不对，所以选A。