5. Read and choose. (12 marks)
e.g. You must/mustn't beat in class.
1 You must/mustn't always do your homework.
2 You mustn't/must talk in class.
3 You mustn't/must put your rubbish in the bin.
4 You must/mustn't listen to music in class.
Ответ: mustn't, mustn't, mustn't, mustn't