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25. The children are going swimming because of the hot weather.

26. If you recycle things, you will save natural resources.

27. If we keep the environment clean, we will have an ideal place to live.

28. If you don't stop using dynamite to catch fish, you will pollute the water.

29. If we pollute the water, we will have no fresh water to use.

30. If we put garbage in the garbage bins, we will minimize pollution.

31. If you are careful, you will get good results.

32. If we plant more trees along the streets, we will have more shade and fresh air.

33. Why don't we make posters on keeping our environment clean?

34. Why not collecting used paper for recycling?

35. How about using public buses instead of motorbikes?

36. I think we should plant some more flowers in our garden.

37. What about putting trash in the garbage bin to keep the yard clean?

38. I don't watch TV as much as my sister does.

39. He prefers playing golf to tennis.

40. No one in class is more intelligent than him.

41. They spent 2 hours watching the film.

42. I spent 2 hours making a birthday cake.

43. It is a two-hour train journey from London to Bristol.

44. The Vietnamese students aren't used to driving on the left.

45. The more you worry, the more difficult you will find it to get to sleep.

25. Because of the hot weather, the children are going swimming.

26. If you recycle things, you will save natural resources.

27. If we keep the environment clean, we will have an ideal place to live.

28. If you don't stop using dynamite to catch fish, you will pollute the water.

29. If we pollute the water, we will have no fresh water to use.

30. If we put garbage in the garbage bins, we will minimize pollution.

31. If you are careful, you will get good results.

32. If we plant more trees along the streets, we will have more shade and fresh air.

33. Why don't we make posters on keeping our environment clean?

34. Why not collecting used paper for recycling?

35. How about using public buses instead of motorbikes?

36.  I think we should plant some more flowers in our garden.

37. What about putting trash in the garbage bin to keep the yard clean?

38. I don't watch TV as much as my sister does.

39. He prefers playing golf to tennis.

40. No one in class is more intelligent than him.

41. They spent two hours watching the film.

42. I spent two hours making a birthday cake.

43. It is a two-hour train journey from London to Bristol.

44. The Vietnamese students aren't used to driving on the left.

45. The more you worry, the more difficult you will find it to get to sleep.