As time went by the plan stuck fairly practical. A. to proveB. to provedC. to provingD.

问题补充：

As time went by, the plan stuck fairly practical.

A. to prove

B. to proved

C. to proving

D. to proves

答案：

A. to prove

(答案→)B. to proved

C. to proving

D. to proves

解析：考查句子结构：本题为省略which/that的定语从句，stick to是“坚持”，宾语是省略的which/that。proved是the plan的谓语，句意：随着时间的推移，坚持的计划证明是很实用的。选B。

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