Choose the correct form. А, В or C, to complete the sentence.

1 Why don't you phone Katie now? She … yet.
2 Take some sun-block and wear a hat, as it … get very hot in the middle of the day.
3 There's no point waiting here any longer. We … go and have something to eat.
4 Lucky you managed to hang on to that tree. You …down the cliff.
5 'What am I going to do about a present for Carol?' 'You … some flowers.'
6 I don't know what time I'll be home. I … be quite late, I'm afraid.
7 Don't worry about your driving test. You … to pass.
8 There's no sign of the dog anywhere. Someone … it out.
9 Why don't you ask Nick about it? He … know the answer, I suppose.
10 There must be some kind of technical problem. The film … by now.

1 A can't have left В must have left С might have left
2 A must В can С could have
3 A can hardly В are bound to С might as well
4 A could have fallen В must have fallen С may have fallen
5 A might have sent her В must have sent her С could always send her
6 A must В can С may
7 A may В must С are bound to
8 A is bound to have let В must have let С can let
9 A can В may as well С might
10 A should have started В must have started С might have started