10.Lily isn’t here.She ______ have gone to the school library,or she ______ have gone to the meeting room,or she ______ have gone home.Who knows?选may,must,can,can't should
问题描述：
10.Lily isn’t here.She ______ have gone to the school library,or she ______ have gone to the meeting room,or she ______ have gone home.Who knows?选may,must,can,can't should
答
may
没有把握，表示也许，不肯定。
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答
may
她不在这里，可能去了图书馆，或者会议室或者回家了
不确定，用可能
答
may
答
may
may
may
答
may 表猜测 不确定,may和must都是表猜测,只是程度不同,must更强烈些.