1. Han Park / 2. Ahmed :) / 3. Bader :D

1. We must speak English in class.
2. We should sleep early in the business day.
3. We have to play with lions.
4. We can jump up the building like the superman.
5. We shouldn't talk in the speaking class.
6. We shouldn't be silly.
7. We must not talk to each other.
8. We must go to school early.
9. We have to study very hard.
10. We mustn't drink petrol at night.