Mọi người ơi, giúp em được không ạ? 3. Some plants _______ us with medicines against cancer, AIDS and other sicknesses. ​A. give​ B. bring ​ C. provide ​D. offer 4. Regular exercise will improve blood ________ . ​A. circle​ B. running​ C. circulate ​D. circulation 5. They are passing new laws to _______ wildlife in the region. ​A. keep​ B. conserve ​C. kill ​D. provide 6. We cannot clean up our _______ rivers and seas overnight. ​A. pollute​ B. polluted ​C. polluting ​D. pollution 7. The disease is _____________ at a rapid rate. ​A. expanding​ B. running ​C. flying ​D. spreading 8. Rapid _____ would cause frequent floods and leave little water during dry seasons. ​A. run-in​ B. run-away ​C. run-off ​D. run-over 9. They used some helicopters to carry food and medical ______ for the flood victims. ​A. tools​ B. tablets ​C. sources ​D. supplies 10. Firemen soon put the fire ________________. ​A. off​ B. away ​C. out ​D. in 11. They are discussing the way to get rid __________ nuclear waste. ​A. from​ B. away from​ C. out of ​D. of 12. The heavy rains have caused _________ in many parts of the country. ​A. water​B. floods ​C. droughts ​D. storms 13. The drought has led to widespread _________ of life. ​A. losing​B. losing ​C. lost​D. loss 14. She took part in a forest ________ project last year. ​A. conserve​B. conservative​C. conservation​D. conservationist 15. A _______ dam uses the power of water to produce electricity. ​A. solar​B. wind ​C. hydroelectric ​D. nuclear 16. By cutting trees, we _______ the natural habitat of birds and animals. ​A. damage​B. hurt ​C. waste ​D. erode 17. Because it had not rained for several months, there was a _______ of water. ​A. waste​B. cut ​C. shortage ​D. drop 18. Man and most animals need a constant supply ______ water to live. ​A. of​B. on​C. up ​D. for 19. To conserve electricity, we are cutting down on our central heating. ​A. protect​B. hold​C. make​D. do 20. The loss of much forest is destroying Earth’s plant and animal variety. ​A. consuming​B. demolishing​C. erasing​D. removing