7. They don’t work hard so they don’t get good grades. If 8. Finish your work or you can’t go out. If…………………………………………………….. 9. They go out often because they aren’t busy. If…………………………………………… 10. They are going to buy a new car. A new car………………………………………… 11. They started working in this company in 2010. They have………………………………….. 12. People make butter from milk. Butter………………………………………………….. 13. Hoa isn’t here so she can’t talk to you. If…………………………………………. 14. Be good or you will be punished. If……………………………………………. 15. I spent 2 days writing the report. It took……………………………………………….. 16. The last time we went out was 2 months ago. We haven’t……………………………………… 17. She doen’t have enough money so she doesn’t buy the house.If…………………………………………