2013届高三一轮复习小专题精品测试系列（9）（英语）
一、单项填空
1.—They ____ have prepared for the meeting more carefully.
—But they didn't. What a pity!
A． shouldn't B． can't
C. may D． ought to
【答案】D
【解析】 考查情态动词。句意：——他们本该更细心地准备会议的。——但他们没有这样做。真可惜！ought to have done 过去本该做某事而未做。
2.—Is Jack on duty today?
—It ____ be him; it's his turn tomorrow.
A．must's B．won't C．can't D．needn't
【答案】C
【解析】 考查情态动词。根据答语的后半句可知“一定不是他值日”，can 表示推测时经常用于否定句或疑问句中。mustn't 表示禁止，不能用来表示推测。
