Question

Answer 1

Turn off the light before you go out.

Don't throw the plastic bottles away.

You should pick up the trash near your school.

Pay attention to teacher.

My sister often donate old books and clothes to charitable organizations.

What can we do to keep the invironment clean?

Answer 2

35. Turn off the lights before you go out.

36. Don't throw away the plastic bottles.

37. You should pick up the trash near your school.

38. Pay attention to teacher.

39. My sister often donates old books and clothes to charitable organizations.

40. What can we do to keep the environment clean?