—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?
此題考查情態(tài)動(dòng)詞表推測(cè)的用法。由后面or...來判斷，說話人對(duì)此事不是很有把握，故用may have done表示對(duì)過去情況不太肯定的推測(cè)，意為“或許做了某事”。must have done用于肯定句，表示對(duì)過去情況肯定的推測(cè)，意為“一定發(fā)生了某事”。
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