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Task 3. fill in the blanks blanks with should or shouldn't, must or mustn't. 1. you enter the shop without face mask. 2. If you have a headache , you take painkillers.3. you spend too much time watching TV.
1. you mustn't enter the shop without a face mask.
2. If you have a headache , you should take painkillers.
3. you shouldn't spend too much time watching TV.
4. she has got the flu. she should stay in bed.