题目内容
1．---Whose backpack is this？---It be Mary's．She is looking for hers．（ ）
| A． | can | B． | must | C． | may | D． | can't |
分析 --这个双肩包是谁的？
--肯定是Mary的，她正找她的包呢．
解答 答案：B．
can能，会；must一定，必须；may可以；can't不可能．本题考察情态动词表推测．must表示肯定推测，can't 表示否定推测．根据She is looking for hers，可知这个双肩包一定是Mary的．故选B．
点评 本题考查了情态动词的用法．熟知句意以及所给选项的意思是解答本题的关键．
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