John's score on the test is the highest in the class ; he____last night.
C
「句意」约翰的考试分数全班最高;他昨天晚上一定学习了。
「难点」表示对过去某一动作行为的猜测须要用musthavedone这一句型结构。
He resented _____ to wait. He expected the minister _____ him at once.
You____that letter to James. However ， you didn't.
I _____ the party much more if there hadn’t been quite such a crowd of people there.