Afterpainstakingefforts,heeventuallyconcludedthatthepr...

問題詳情：

 After painstaking efforts, he eventually concluded that the principle he stuck _______ true.

A. to proved         B. to proving      C. to be proved        D. to being proved

【回答】

A

知識點：非謂語動詞

題型：選擇題