1) Students ________ wear uniforms at school. a) must b) have to 2) You ________ clean the floor. I've already done it. a) don't have to b) mustn't 3) You _______ drop litter here. It's against the rules! a) don't have to b) mustn't 4) Sue missed her train yesterday and she __________ wait two hours for the next one. a) have to b) had to 5) It's a great book! You ________ read it! a) have to b) must 6) Tom is lucky. He ________ get up early on Monday mornings because he starts school at 10 a.m a) doesn't have to b) mustn't 7) When we were at school we ________ wear a uniform. a) must b) have to c) had to 8) You __________ be an expert to use the basic functions of program. a) mustn't b) don't have to 9) The museum is free. You _________ pay. a) don't have to b) mustn't 10) You ________ park here. It's an emergency exit. a) don't have to b) mustn't

have to, must, mustn`t

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