Nothing that he suggested to be of any use.A. proveB. provedC. provingD. to prove

问题补充：

Nothing that he suggested to be of any use.

A. prove

B. proved

C. proving

D. to prove

答案：

A. prove

(答案→)B. proved

C. proving

D. to prove

解析：句子主语是 nothing，that he suggested 是修饰主语的定语从句，suggested 的宾语是引导该定语从句的关系代词 that，而不是其后的动词；句子谓语是 proved。全句意为“他建议的情况没有一条是有用的。”