The A(room) is B(crowd) C(with) D(people). 有

问题描述:

The A(room) is B(crowd) C(with) D(people). 有
TheA(room)isB(crowd)C(with)D(people).
有一处错误,找出并改正.
求解啊!

B 改成By改成by?恩麻烦解释下意思可以吗??屋子被一群人占了多谢!