中文谷Wedon'tknowwhotheyare.Butwe'resurethey beverykindbe...
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问题详情：
We don't know who they are. But we're sure they be very kind because they have helped us so much.
A．must B．might C．may C．can
【回答】
A
知识点：情态动词
题型：选择题
标签：
beverykindbe
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