单选题 —Hi, is that Peter Brown?
—Sorry. You ______ the wrong number.
  • A. must dial
  • B. must have dialed
  • C. should dial
  • D. should have dialed


【正确答案】 B
【答案解析】must have done表示对所发生事情的肯定猜测，“你刚才一定是拨错号码了”。