1) It's my grandmother's birthday today. I ______ ( forget ) to phone her. a) must forget b) mustn't forget 2) My brother failed his maths test. He ______ ( study ) more. a) must study b) mustn't study 3) Turn off your mobile phones. You ______ ( use ) them in here. a) must use b) mustn't use 4) It's going to be very cold. You _____ ( wear ) a coat. a) must wear b) mustn't wear 5) We can't go straight. We ______ ( turn ) right. a) must turn b) mustn't turn 6) That film is awesome! You _____ ( see ) it. a) must see b) mustn't see 7) The desert is a dangerous place. You _____ ( be ) careful. a) mustn't be b) must be 8) We have to wake up early tomorrow. We _____ ( go ) to bed late. a) mustn't go b) must go

UNIT 10 Grammar

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