Question

－Hi, is that Peter Brown?

－Sorry．You _______ the wrong number．

[　　]

A．

must dial

B．

must have dialed

C．

should dial

D．

should have dialed

Answer 1

答案：B
解析：

must have done表示对已完成事情的肯定猜测，意为“一定已经做了某事”。