Question

The old man ____ down by a truck is being saved now.

A．knocking

B．to knock

C．knocked

D．being knocked

Answer 1

C

试题分析：考查过去分词做定语：句意：被卡车撞倒的老人现在正在被救治。Is being saved是这句话的谓语，所以这里需要填的是定语，因为the old man和knock down是被动关系，用过去分词做定语，选C。