题目内容
6．---Excuse me，when are we going to have a school trip？---I'm not sure．Ask Thomas，please．He _________ know．（ ）
| A． | need | B． | can | C． | may | D． | shall |
分析 --打扰下，我们打算什么时候出游？
--我不确定．请询问托马斯．他可能知道．
解答 答案：C．考查情态动词．句意"--打扰下，我们打算什么时候出游？--我不确定．请询问托马斯．他可能知道．"．need需要．can能．may可能，也许．shall将要，根据I'm not sure我不确定，可知应该是他"可能"知道．表示推测用may．答案是C．
点评 情态动词无人称和数的变化；不能单独使用，必须与其后的动词原形构成谓语．此题要注意区分情态动词的不同用法．
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