After two hours of hiking we finally reached Tom thought was the best place to camp.A. w

问题补充：

After two hours of hiking, we finally reached Tom thought was the best place to camp.

A. where

B. which

C. what

D. that

答案：

A. where

B. which

(答案→)C. what

D. that

解析：考查名词性从句。reach后面是宾语从句，从句中缺少主语，Tom thought是插入语。故用what。