It is necessary for us () (动词 master 的合适形式) (我们有必要掌握)at least one foreign language.
It is necessary for us () (动词 master 的合适形式) (我们有必要掌握)at least one foreign language.
相关考题:
It is no use () (动词 cry 的合适形式)(做某事没有用)over spilt milk.