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

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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

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
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

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
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.

是I,这里现在进行式,动词要加ing形式

hear sb doing sth是固定结构,译为听到某人正在做某事,你听到的同时动作正在进行