Question

The chairman thought       necessary to invite Professor Smith to speak at the meeting.

A．that

B．this

C．it

D．which

Answer 1

C

解析试题分析：句意：主席认为邀请斯密斯教授在会上发言是必要的。it是形式宾语，to invite Professor Smith to speak at the meeting才是真正的宾语。句型是：think It necessary to do sth“认为做…是必要的“，选C。
考点：考查形式宾语。