After the long journey the guidea very good one.A. provedB. proved to beC. proved ofD. all

问题补充：

After the long journey,the guidea very good one.

A. proved

B. proved to be

C. proved of

D. all the above

答案：

A. proved

B. proved to be

C. proved of

(答案→)D. all the above

解析：prove(to be)=prove of意为“事实或结果证明了主语……”。