He liked to go to dances and parties he could have a good time just sitting and watching

问题补充：

He liked to go to dances and parties, he could have a good time just sitting and watching.

A. where

B. when

C. which

D. that

答案：

(答案→)A. where

B. when

C. which

D. that

解析：本题考查非限制性定语从句。从句意义完整，故引导词作状语，而先行词dances and parties是表示抽象地点的词，故用where。