题目内容：

Ping Pong is popular among China ,____ both young and old can ____
A about it ; take part in
B in it ; take part
C in which ; take part in
D in which ; take part

优质解答

D in which ; take part
这是一个定语从句,take part in是固定搭配,意思是参加...活动
which是先行词,当有介词时,该介词要放在which前面