język angielski klasa 5 zadanie 1 strona 53 ćwiczenia pls

1. cheat in tests
2. return your library books on time
3. study for your exams
4. use your mobile in class
5. return your library books late
6. change your shoes
7. drop litter
You must:
You musn't
1.tests
2.time
3.study
4.mobile
5.late
6.shoes
7.drop
1a(you must.) 1b(yoy mustn't)
2,3,6 1,4,5,7