John's score on the test is the highest in the class ; （）he last night.
A、muststudyC
「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。
All of us would have enjoyed the party much more if there _____ quite such a crowd of people there.
The（） inJanet‘scharacterhashinderedherfroomadvancementinhercareer.
The compositions contained so few errors that the teacher got the students _____ one another ’s papers.
This missile is designed so that once _____ nothing can be done to retrieve it.
John's score on the test is the highest in the class ; （）he last night.
