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

—I hear you’ve got a new iPhone 4S. ______ I have a look?—Yes, certainly.

No person _______ carry a mobile phone into the examination room during the national college Entrance Examinations. 

-Why ________ it rain at weekends?-Never mind, let’s watch TV at home.

— Li Lin hasn’t turned up yet, but he promised to come to the party.— He ______ home. He is a man of keeping his word.