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

网友回答

A. to proved
B. to proving
C. proved
D. to be proved
解析： 本题要求学生会分析句子。本题为省略which/that的定语从句，proved是the plan的谓语，stick to的宾语是which/that。