As time went by the plan stuck fairly practical.A. to provedB. to provingC. provedD. to

问题补充：

As time went by, the plan stuck fairly practical.

A. to proved

B. to proving

C. proved

D. to be proved

答案：

(答案→)A. to proved

B. to proving

C. proved

D. to be proved

解析：考查分析句子。句意：随着时间的推移，被坚持的计划被证明相当实用。本题为省略which/that的定语从句，proved是theplan的谓语，stickto的宾语是which/that，prove在这里是证明是;结果是;事实说明的意思,用作连系动词,主动表被动，选A。