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

B

 

情景对话题。对过去事情的肯定的推测，用must have done sth表示“一定做了……”。