题目内容
10．Helen __________ be at home at the moment．I have just seen her in the market．（ ）| A． | can't | B． | can | C． | must |
分析 Helen 现在不可能在家里．我刚刚在市场里看到她了．
解答 答案：A．can't不可能；can能，会；must一定，必须．根据I have just seen her in the market，可知我刚刚在市场里看到她，所以Helen 现在不可能在家里．can't不可能．故选A．
点评 本题考查了情态动词的用法．解答时注意理解句意以及所给选项的意思．
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