---- May I smoke here?---- If you      , choose a seat in the smoking section

The man ______ be my father. My father is much taller.

You needn’t have come in person --- a letter _____enough.

—________ I take the book out?—I'm afraid not.

--Look! The girl passing by must be a newcomer!---No, she _______ be a newcomer. I’m sure it is at least one year since she came to live here.