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。
AlthoughSPanish，heattendedthecourse.
Theeldestchildisthoroughly（）becausetheyalwaysgivehimwhateverhewant.
Modern（）perhapscausesmoreproblemsthanitsolves.
Ininternationalmatches,prestigeissoimportantthattheonlythingthatmattersistoavoid_____.
Our（）sensitivitydecreaseswithage.Byage60，mostpeoplehavelost40percentoftheirabilitytosmelland50percentoftheirtastebuds.
