---You’re trembling. What’s happened?---- I ______ outside in the cold for over an hour waiting for a bus.

— Is there anything wrong, Bob? You look sad.— Oh, nothing much. In fact, I ________ of my friends back home.

 —What’s the noise?   —Oh, I forget to tell you. The new machine     .

After school we went to the reading-room to do some reading, only to be told that it ____________.

---- Flight 551 for Dallas ________. I must be off now. ------Have a pleasant trip then.