If you _____ smoke, please go outside.

－Mom, I’m leaving. －It’s raining. You’d better ________ an umbrella with you. 

I__________through that bitter period without your generous help.     

 ---The book _____ be Tom’s.---No, it _____ be his. There’s a name on the book. It’s Jim’s.

— Shall we meet at the station at 8 a.m.? — In fact we _________. The train _________ until 10 a.m..