问题
单项选择题
—She was in class on Friday afternoon, but no one has seen her since.—She ______ an accident.
A. might have
B. might have had
C. may have
D. ought to have had
答案
参考答案：B
解析：might have done表示对过去的一种可能性推测。句意为：“她星期五下午在班里但从那以后就没人看见她。”“她可能发生什么意外的事了。”