Complete the sentences with should or shouldn't

Complete the sentences with should or shouldn't.

1. You ...... go to bed early when you have school the next day. 

2. You ......... eat a lot of fast food - it's bad for you. 

3. You ....... find someone to ask about your homework. 

4. The teacher is annoyed with Erik - he ...........behave better in class. 

5. I really ......... play these computer games - they are a waste of time! 

6. We ............. make a reservation at the restaurant for your birthday dinner.