题目内容

—Bob, where is Linda?
—She          be in the library, but I am not sure.
A．must B．may
C．need D．has to
B

试题分析：句意：—鲍勃，琳达在哪儿？—她可能在图书馆。但是我不确定。此处表推测，根据答语but I am not sure.说明把握性不大。must一定，很有把握，may可能，把握性较小，need和has to没有表推测的用法，故选B。
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