You'll find it hard to get rid of the drug habit _______ you have it.
Harry is feeling uncomfortable. He _____ too much at the party last night.
When I was a child, I ______ watch TV whenever I wanted to.
He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
--- You needn’t take an umbrella. It isn’t going to rain. --- Well, I don’t know. Itdo.
If you smoke, please go outside.