Ответ:

2. if you are nice to me...

3. ...., I will do my best

4. ..., if you don't listen to me

5. .... , you will have longer day

6. .... , if DVD player doesn't work

7. .... , if the cook puts in less sugar

8. .... , if they don't do the homework

9. If I save my money, ...

10. ... , I will see my friends