7. A / an _______ species is a population of an organism which is at risk of becoming extinct.

8. Only a few of the many species at risk of extinction actually make it to the lists and obtain legal _______.

11. 15,589 species (7,266 animal species and 8,323 plant species) are now considered _______ risk _______ extinction.

effect

pollution

habitat

endangered species

17. _______ is the existence of a wide variety of plant and animal species living in their natural environment. .

18. Peter has been working for 10 hours. He _______ be very tired now.

23. Frank's wallet is lying on the coffee table. He _______ it here last night.

25. You _______ take your umbrella along with you today. It _______ rain later on this afternoon.

6. Almost half of turtles and tortoises are known to be threatened with ____.

8. It is reported that humans are the main reason for most species' declines and habitat _______ and degradation are the leading threats.

9. We have to apply effective measures to save many plant and animal species _______ extinction.

10. Over-exploitation for food, pets, and medicine, pollution, and disease are recognized _______ a serious threat _______ extinction.

11. Clearing forests for timber has resulted _______ the loss of biodiversity.

diversity

disappearing

14. _______ is the protection of environment and natural resources.

destruction

16. Toxic chemicals from factories are one of the serious factors that leads wildlife to the _______ of extinction.

18. Since _______ 1600s, worldwide overexploitation of animals for _______ food and other products has caused numerous species to become extinct or endangered.

19. I _______ be at the meeting by 10:00. I will probably _______ take a taxi if I want to be on time.

21. The television isn't working. It _______ during the move.

22. I am not deaf. You _______ shout.

23. John failed again. He _______ harder.

24. _______ I borrow your lighter for a minute? - Sure, no problem. Actually, you _______ keep it if you want to.

28. It is a top secret. You _______ tell anyone about it.

29. We have plenty of time for doing the work. We _______ be hurried.

7. Farmers make their soil more productive by distributing _______.

8. Chemical wastes from factories are _______ that cause serious damage to species habitats.

9. Contamination and global warming have driven many species of animals and plants _______ the threat of extinction.

10. Although we are aware _______ the importance of environment, we still overexploit it.

13. Everyone knows what is happening to _______ earth but we just do not know how to stop it.

15. If an area is _______, all the trees there are cut down or destroyed.

provide

awareness

18. All the countries of the area have _______ to protect their wildlife but they are rarely enforced.

19. Keep quiet. You _______ talk so loudly in here. Everybody is working.

20. John is not at home. He _____ go somewhere with Daisy. I am not sure.

21. _______ I have a day off tomorrow? - Of course not. We have a lot of things to do.

22. The computer _______ reprogramming. There is something wrong with the software.

24. You _______ touch that switch, whatever you do.

29. _______ We have still got plenty of food.

30. John passed his exam with a distinction. _______.

31. _______. We got there far too early.