natural wondersVersion en ligne luyện tập must/ mustn't par Trang Dương 1 you ..... do your homework a must b mustn't 2 we .... speak loudly in the library a must b mustn't 3 you .... be late for school a must b mustn't 4 everybody .... fasten their seatbelt in the car a must b mustn't 5 you .... smoke a must b mustn't 6 students.... listen to the teacher a must b mustn't 7 you... stop when you see the red light. a must b mustn't 8 you.... use a telephone in the class a must b mustn't 9 you.... be quiet at the cinema a must b mustn't 10 you .... raise hand to speak in the classroom a must b mustn't 11 children .... talk to strangers. a must b mustn't 12 you .... speak during the class a must b mustn't 13 you .... show your passport to the officers a must b mustn't 14 we....throw rubbish around. a mustn't b must 15 we .... touch the objects in the museum. a mustn't b must
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