He talks about Rome as if he _________there before.

— When can I see you, Mr Black? Three o’clock this afternoon?— Oh, no. I ________ a meeting then. 

  30．When you finish your work, don’t forget to put the tools back where they ________．

.The letter from his girlfriend he had been looking forward to _________yesterday.

 Frank ______ London by train which ________ at 8:30 next morning.