Question

【题目】__________ is believed that Edison invented the light bulb.

A. It B. That C. This

Answer 1

【答案】A

【解析】句意：人们相信爱迪生发明了电灯泡。考查固定用法It is believed that表示人们相信…，这里的that后面的从句是真正的主语。It是形式主语。相似的还有It is said that据说。故选A。