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。
There are only ten apples left in the baskets, _____ the spoilt ones.
Josephwasverylucky____withhislife;healmostdidnotgetoutoftheroom.
Last March the __________ of a 19th century cargo ship was found by an underwater archaeological team.
If not _____with the respect he feels due to him, Jack gets very ill-tempered and grumbles all the time.
This missile is designed so that once _____ nothing can be done to retrieve it.