The shopkeeper did not want to sell for he thought was not enough.A. whereB. howC. whatD.

问题补充：

The shopkeeper did not want to sell for he thought was not enough.

A. where

B. how

C. what

D. which

答案：

A. where

B. how

(答案→)C. what

D. which

解析：本题考查名词性从句。注意从句中的he thought为插入语，可以把它去掉。然后可以分析出从句缺少主语，故用what作主语。