14. What about using electricity economically?

15. If you study hard, you will pass the final exam.

16. He was seriously sick, so he couldn't come to class.

17. Do they have to take care of the school garden every Saturday?

18. I suggested having lunch at a restaurant.

19. If you watch too much TV, you won't be healthy.

20. I suggested replacing energy-saving bulb.

21. If you stay up late, you will be very tired.

22. If you start at once, you won't be late for school.

23. Because of the polluted air in the city, many people want to go to the countryside to enjoy fresh air.

24. We are looking forward to watching the soccer match between Viet Nam And Uzbekistan next Saturday.

25. You should have your motocyvle checked by a mechanic regularly.

26. I had someone fix my car.

27. I have difficulty in reading his handwriting.

28. Mr Ha had the pipes checked by a plumber.