III. Mark the letter A, B, C, or D to indicate the correct answer to each of the following sentences.
5. Burning yard waste releases mold spores, soot, and other contaminants that can aggravate allergies and cause ____ problems.
A. respirator B. respiration C. respiratory (adj/ hô hấp ) D. respired
6. Waste from industrial and agricultural ____ pollutes the water that is used by humans, animals and plants.
A. acts B. actions C. interactions D. activities
7. Natural disasters like earthquakes, floods, tsunamis, cyclones, volcanic eruption can be unpredictable, ____ and can cause irreparable damage.
A. devastated B. devastating C. devastative (adj/ phá hủy ) D. devastatingly
8. Depletion of the crucial Ozone layer of the atmosphere is ____ to pollution caused by Chlorine and Bromide found in Chlorofloro carbons (CFC's).
A. attributed ( quy cho ) B. subjected C. indebted D. entitled
9. "Are you going to join the green city campaign?" “____.”
A. Surely, I am B. No, not mine C. None of that D. Just kidding
10. "Do you recycle anything?" “____.”
A. Yes, I recycle glass bottles B. I've bought a lot of recycled things
C. I have a lot of things D. How to recycle is easy
11. Biological diversity, or biodiversity, is the variety of life either in a particular place or on the entire Earth, ____ its ecosystems, species, populations, and genes.
A. include B. includes I bao gồm ) C. including D. inclusive
12. Preservationists believe that humans can have access to the land, but they should only utilize it for ____ natural beauty and inspiration.
A. the B. their C. its D. those
13. Biological diversity, or biodiversity, is the variety of life either in a particular place or on the entire Earth, ____ its ecosystems, species, populations, and genes.
A. include B. includes C. including D. inclusive
14. To help save the environment, try ____ energy and water consumption, changing your eating and transportation habits to conserve natural resources, and adapting your home and yard to be more environmentally friendly.
A. decrease B. to decrease C. decreased D. decreasing (try ving: thử làm gì ) 
15. By using the environment sustainably, the environment and the natural resources ____ provides will not be depleted or destroyed permanently - and will be available for human use for a very long time.
A. that B. which ( mệnh đề quan hệ ) C. what D. it
16. Fossil fuel utilization brings about discharge of greenhouse gases, ____ causes environmental change.
A. which B. that ( sau dấu phẩy ko dùng that ) C. it D. they
17. Land pollution can have huge environmental impact ( ảnh hưởng ) ____ the form of air pollution and soil pollution which in turn can have adverse effect on human health.
A. on B. in C. to D. with
18. Consumption of fossil fuels at an alarming rate can ____ to global warming which can further result in melting of polar ice caps and increase in sea levels.
A. lead to ( dẫn đến ) B. drive C. attach D. run    

5. C

6. C

7. D

8. B

9. A

10. A

11. C

12. C

13. B

14. A

15. B

16. A

17. A

18. B