I like when my parents are friendly to me.A. itB. thatC. theseD. them

问题补充：

I like when my parents are friendly to me.

A. it

B. that

C. these

D. them

答案：

(答案→)A. it

B. that

C. these

D. them

解析：选A。it指代整个从句的内容。