My uncle has a lot of books, are about puter science and technology.
A. most of them
B. most of that
C. most of which
D. and most of which
网友回答
A. most of them
B. most of that
(答案→)C. most of which
D. and most of which
解析：考查定语从句。本题定语从句的先行词是a lot of books，定语从句中which指代先行词作为of的宾语。That不能放在介词的后面，them不能引导定语从句。D项中因为有了and说明是一个并列结构。which应该改为them。故C正确。