The youth____the construction of the future

问题描述:

The youth____the construction of the future
A.is playing an important part in
B.is playing an important part at
C.are playing important parts at
D.are playing an important part in

D
play an important part in 是一个固定词组.the youth 是一个整体表示青年人 the 加形容词表示一类人,比如 the old the poor