4. Fill each blank with must or mustn't.
(Điền vào mỗi chỗ trống với must hoặc mustn’t.)
1. You_________leave the hotel room before 12 o'clock.
2. You_________make lots of noise in the museum.
3. My mum says you_________always tell the truth.
4. You know you_________go to bed with your shoes on.
5. I want to speak English better. I_________practise more.
1. must
2. mustn't
3. must
4. mustn't
5. must
1. You must leave the hotel room before 12 o'clock.
2. You mustn't make lots of noise in the museum.
3. My mum says you must always tell the truth.
4. You know you mustn't go to bed with your shoes on.
5. I want to speak English better. I must practise more.