After driving for five hours they arrived atthey thought was the place they had been drea

问题补充：

After driving for five hours, they arrived atthey thought was the place they had been dreaming of.

A. what

B. that

C. which

D. where

答案：

(答案→)A. what

B. that

C. which

D. where

解析：考查名词性从句。arrived at 后事一个宾语从句，they thought 做插入语，从句中缺少主语，所以用what。