John'sscoreonthetestisthehighestintheclass;he____lastnight.
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must have done 这一句型结构。
At______,photographyisachemicalprocess,duringwhichalight-sensitivematerialisalteredwhenexposedtolight.
The minister of finance is believed _____ of imposing new taxes to raise extra revenue.
MissGreenwas（）$100fordrivingafterdrinking.
YouthatlettertoJames.However，yodidn't（）.
I don’t like _____ bills but when I do get them I like _____ them promptly.
