23. If we turn on the heater all the time, we will pay three milion dong for electricity a month.

24. Food and blankets have been given out to the homeless people by volunteer.

25. If you don't careful, you will feel sorry afterwards.

26. After volunteers had given out the food and blankets, they cleared up the debris.

27. Because there is too much light pollution, we can't see stars at night.

28. Water pollution can have many different causes.

29. Human may even die if they drink contaminated water.

30. What should we do to reduce water pollution ?

31. The USA, the United Kingdom and New Zealand are English speaking countries.

32. New Zealand is famous for rich cultual and amazing natural beauty.

23. If we turn on the heater all the time, we will pay three million dongs for electricity a month.

24. Food and blankets have been given to the homeless people by the volunteers.

25. If you don't do it carefully, you will feel sorry afterward.

26. After volunteers had given out the food and blankets, they cleared up the debris.

27. Because of the light pollution, we can't see stars at night.

28. Water pollution can have many different causes.

29. Humans may even die if they drink contaminated water.

30. What should we do to reduce water pollution?

31. The USA, New Zealand, and the UK are English-speaking countries.

32. New Zealand is famous for rich culture and natural beauty.