问题补充：
— ? —They’re Chinese books.
A. Are these Chinese books?
B. Are those Chinese books?
C. What’re these in English?
D. How are these books?
答案：
A. Are these Chinese books?
B. Are those Chinese books?
(答案→)C. What’re these in English?
D. How are these books?
解析：根据答语的结构和含义可知，询问的是那是什么，故选C。
