It’s funny that Howard___ speak to you like your boss. 

You ______ be polite to the old man.

I’m as busy as a bee；________ you bother me with so many questions now?

 --- Would you mind if I smoked here?---I am afraid…, but if you________.

— 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.