____ makes men different from the other animals is that they can

____ makes men different from the other animals is that they can think and speak.
A、That
B、The thing
C、All
D、What
【正确答案】：D
【题目解析】：此题测试的是连词的用法。本句为what引导主语从句，what在从句中做主语。本句的意思是：“人类和其他动物的区别在于，人类有思维和语言。”