Question

China is a country with the largest population in the world,          we all know it.

A．and

B．which

C．that

D．as

Answer 1

A

试题分析：句意：中国是世界上人口最多的国家，我们都知道这一点。we all know it.是完整的句子，所以不是定语从句，不能填which或as，that不能连接两个并列句，所以选A。