After 5 hours drive,they reached____they thought was the place they'd been dreaming of .A that B where C which D what为什么选D啊?

问题描述:

After 5 hours drive,they reached____they thought was the place they'd been dreaming of .
A that
B where
C which
D what
为什么选D啊?

本题为一个主语从句,BC项不能引导主语从句,先排除;
what=名词+that,而题目中缺少名词,所以选择D。
具体情况请参阅主语从句的语法

what作为was the place they'd been dreaming of .
的主语,有作为they reached宾语.
其他的无这个用法.