John'sscoreonthetestisthehighestintheclass;he____lastnight.
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must have done 这一句型结构。
WhenthepoliceofficerswhotookpartintheKingbeatingwerefirstbroughtto___________,theirlawyersusedthevideotapeasevidenceagainsttheprosecution.
Nancywassurprisedthattheyhave（），Theyseemedtobeahappycouple.
Marytiptoedoverandtooktheclockawaybecauseshehatedtohearit（）whenshewastryingtogotosleep.
Theopeningceremonyisagreatoccasion.Itisessential_____forthat.