Help me help me,help me,help me,help me,help me,help me,help me Question 12. Water pollution can put negative __________ on our health. A. contamination B. affects C. effects D. problems Question 13. A: How can light pollution __________ animals? B: It can make animals change their behavior patterns. A. cause B. make C. affect D. lead Question 14. The dove is a universal __________ of peace. A. symbolizing B. symbolize C. symbolic D. symbol Question 15. The city has an atmosphere which is quite __________. You will never feel like that in other places. A. important B. normal C. unique D. common Question 16. __________ about the storm that stroke Hanoi last night? A. Did you hear B. Do you heard C. Have you hear D. Did you heard Question 17. Many people __________ because of the earthquake last week. A. did injure B. injured C. have injured D. were injured Question 18. When I looked at the river, I knew it __________ for a long time. A. had contaminated B. had been contaminated C. was contaminated D. contaminated Question 19. All flights to Ha Noi had to be cancelled __________ the storm. A. as a result B. due to C. because D. so Question 20. When we were young, we __________ in the river near our home. A. used to swim B. have swum C. had swum D. were swimming