In the cave they found the very book the cover of was torn.A. whichB. whatC. thatD. whose

问题补充：

In the cave they found the very book, the cover of was torn.

A. which

B. what

C. that

D. whose

答案：

(答案→)A. which

B. what

C. that

D. whose

解析：考查定语从句。本题定语从句的先行词是the very book,在定语从句中which指代先行词作为介词of的宾语。句意：在洞穴里，他们找到了那本书，书的封面都毁坏了。What不能引导定语从句，that不能放在介词的后面；故A正确。