问题
选择题
The fact that fun is not equal to happiness may be the opposite of ______ many people actually understand.
A．why
B．that
C．which
D．what
答案
答案：D
考察宾语从句。What引导宾语从句what many people actually understand并作为understand的宾语。Which指特定范围内的某一个。故D正确。