--Excuse me, I don't think you can smoke here. ---Really sorry. I ______ this is a non-smoking room.

 After the terrorist attack last month, anyone at the airport       heavy bags, bottles of liquid, or whatever, could be stopped and questioned by the police.

— Why is the librarian looking so hard at me?— You ____ to read aloud in the reading room 

—Why not find a new job?—Why should I? I _____________ as much，but I like what I'm doing．

  ---What were you doing when I phoned you?---I had just finished my homework and ______ to take a bath.