Many people like to talk about generation gaps. I don't think there is in my family thoug

问题补充：

Many people like to talk about generation gaps. I don think there is in my family though.

A. it

B. some

C. none

D. one

答案：

A. it

B. some

C. none

(答案→)D. one

解析：D 考察代词。句意：许多人喜欢谈论代沟，然而我们家没有代沟。由句意可知选择肯定意义的代词，排除C项。It指代同一事物；some某些，one指代前面的generation gap。