() 1. Students in our school know shouting is not allowed in the library.

   A. can   B. may   C. must   D. need

5. The workers are discussing which colour (paint) the walls.

4. Everyone must not (smoke) in the library.

3. Students do not have to (go) to school at weekends.

2. Fin did not know who (talk) to about this book.

1. Mr Green showed us what (do) first.

5. Every day students should get to school and get home (准时) .

4.  (上交) your examination paper as soon as possible.

3. Lucy hasn’t finished reading the book,so she wants to (续借) it.

2. You should (归还) the storybook to Mary this afternoon.