You’d better book the tickets in advance; _______ we may miss the concert. 

The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work. 

My goodness, look at the time! It’s nine o’clock already and I’m _____ at breakfast. 

— Lovely weather, isn’t it?— Yes, a bit hot, ______ ．

Don’t talk round the question; come             to the point.