Đáp án:

1: The man they are paid $ 80.

2: The truck is recycled from aluminum cans. These are two dilloar.

3: Russian and Chinese girls are playing chess.

4: I was given a birthday flower by Nam.

5: Pollution could be prevented by Keep clean environment Use recycled paper to help save trees Plant more trees Try to avoid buying plastic. To protect environment we also have to save energy . Walk more, drive less to protect natural resources. to conserver wild life. to conserve the old forest, rainforest, to prohibit hunters who hunt wild animals out of the law. When we protect the environment, it’s mean we are protecting ourselves and our future as well. I hope that in the future the earth will be cleaner.

1: they paid the man$80(passive form)
-> The man.......is paid $80
2:The truck is recycled from aluminum cans.It is two dilloars(ed participle) 
->The truck....recycled from aluminum is 2 dilloars
3:the girls are Nga and Hoa.They are playing chess(ing participle)
->The girls......playing chess are nga and hoa
4:Nam gives me flowers on my birthday(passive form)
->I....am given flowers on my birthday
5: write aparagraph(80 từ) about recycling

recycling plays an important role in reducing waste from people. anyone can recycle. you can recyle your old tires, your old clothes or anything you want. recycling will help you save money because instead of buying things you can recycle it.