問題詳情:
--- There’s somebody at the door. Who _____ it be? Is it the postman?
--- No, it _____ be him. It’s just seven o’clock. It’s too early.
A. may; can’t B. will; won’t C. may; mustn’t D. must; may not
【回答】
A
知識點:情態動詞
題型:選擇題