— Professor Smith, some students want to have a talk with you. ___ they wait here or outside?— Show them in now, please.

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

Don’t interrupt me ,John ．      you force me to tell you the truth at the moment?

—Have you decided where to spend your summer holiday?—Not yet. We ___ go to Hong Kong.

I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house.