—Believe it or not, I have met him before.—No kidding? ________ you've never mentioned it?
I __________ use a clock to wake me up because at six o'clock each morning the train comes by my house.
-__________ you interrupt now? Can't you see I'm on the phone?-Sorry Sir, but it's urgent.
I am going to Europe on vacation together with John if I __________ find the money.
-I regret to say that I failed to rank first in the terminal exam.-Come on, nobody __________ win all the time.
-Sorry, Mum. I got a C in the exam.-You __________ have done better.