1) If A is bigger than B, and B is bigger than C, then C _______ be bigger than A. a) must b) can't 2) Gemma _______ be able to translate this for you - she knows some Arabic. a) must b) can't 3) 'You've won first prize!' - 'lt _______ be true!' a) must b) can't 4) Look at their huge house. They _______ have plenty of money. a) must b) can't 5) Look at those clouds. We _______ get some rain soon. a) must b) can't 6) I'm going out for a bit. I _______ be home too late. a) must b) can't 7) That _______ be her mother - they're more or less the same age. a) must b) can't 8) 'We're off to Turkey for a week.' 'That _______ be nice!' a) must b) can't 9) Can I have a few words with you? It _______ take long. a) must b) can't 10) That _______ be Daniel - he's in Morocco. a) must b) can't

Certainty: must / can't

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