The project alongside with the experiment we had once devoted so much time ______ perfectly.
A．to work outB．to working out
C．to worked out D．has worked out
C

試題分析：本題中含有一個定語從句we had once devoted so much time to，這個定語從句修飾先行詞the experiment，定語從句中有一個固定搭配devote some time to…花時間在…之上；橫線首先要填to，然后再接謂語動詞work out。另外定語從句中使用了過去完成時had devoted，說明后面主句使用的是過去的時態(tài)。句義：這項工程和我們已經(jīng)花了很多時間做的實驗結(jié)果非常完美。故C正確。
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