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    精英家教网 > 高中英语 > 题目详情
    —Why does Sara know so much about Angkor Wat??
    —She _______ there,or she may have read about it.?
    A．must have been?
    B．shouldn’t have been?
    C．may have been?
    D．can’t have been?
    C?
    此题考查情态动词表推测的用法。由后面or...来判断，说话人对此事不是很有把握，故用may have done表示对过去情况不太肯定的推测，意为“或许做了某事”。must have done用于肯定句，表示对过去情况肯定的推测，意为“一定发生了某事”。
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