--Are these your books?--Yes A. theyreB. they areC. these areD. thesere

问题补充：

--Are these your books?

--Yes,

A. they e

B. they are

C. these are

D. these e

答案：

A. they e

(答案→)B. they are

C. these are

D. these e

解析：对带有these和those的一般疑问句的肯定回答，要用they来代替。另外，they和are在肯定和否定回答时不可缩写。