L hear Mrs Brown()her son in the next room.Let's go and see what's happening.
问题描述：
L hear Mrs Brown()her son in the next room.Let's go and see what's happening.
A.beat B.to beat C.beating为什么选择C
答
hear sb doing 听见某人正在做某事.
我听见布朗夫人正在隔壁房间打她的儿子,让我们过去看看发生什么事.