Complete the text with have to/must/mustn't/can/could/may/can't/needn't.
1.You ... listen to your teacher and carry out your teacher's orders.
2.You ... walk or run in the classroom.
3.If you want to ask something,raise your hand and ask:"... I go out,please?" or "... you give me a book,Ms Smith?
4.You ... use your mobile phones in the lessons but you ... phone your parents during the break.
5.There are lots of interesting books in the classroom and you ... read them during the breaks and after the lessons.
6.You ... bring your textbooks to school,we have extra copies in the classroom.
7.You ... leave the classroom after the bell and with my permission.
8.Don't forget that you ... wear your school uniform at school.
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