1) You ________ tidy up your room. a) must b) mustn't 2) You ________ do your homework. a) mustn't b) must 3) You ________ play with fire. a) mustn't b) must 4) You ________ be home on time. a) must b) mustn't 5) You ________ cheat in a test. a) must b) mustn't 6) You ________ turn the music too loud. a) mustn't b) must 7) You ________ help in the house. a) mustn't b) must 8) You ________ annoy your little sister. a) must b) mustn't 9) You ________ bite nails. a) mustn't b) must 10) You ________ smoke. a) mustn't b) must

Must & mustn't

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