日本成人片在线_久久免费精品视频_国产午夜精品久久久久久免费视_校花撩起jk露出白色内裤国产精品_av影片免费在线观看_国产小视频在线看_最新av免费在线观看_99久久99久久精品国产片_欧美成人猛片aaaaaaa_蜜桃免费网站一区二区三区

—Look! The man at the gate ________ be our headmaster.

—No, it _________ be him. He is holding a meeting in the office.

A. must, can’t     B. must, mustn’t    C. can, can’t     D. can, mustn’t

—Look! The man at the gate ______ be our headmaster. He is always standing there every morning.
—No, it ______be him. He is holding a meeting in the office now.

—Look! The man at the gate ______ be our headmaster. He is always standing there every morning.

—No, it ______be him. He is holding a meeting in the office now.

A．must, can’t                           B．must, mustn’t

C．can’t, can’t                          D．can’t, mustn’t

—Look! The man at the gate         be our headmaster. He stands there every morning.

      —No, it        be him. He is holding a meeting in the office now.

      A. must； can’t   B. must; can C. can’t; mustn’t D. can’ t; must