问题
选择题
--- Hi, Lucy．Do you know where Linda is?
--- She in the library．I saw her there just a few minutes ago．
A．shall be
B．must be
C．should have been
D．might have been
答案
答案：B
考查情态动词must表推测的用法。must + do表示对现在事情的推测。所以选B。