... the piano for five years. THE END ĐỀ ĐỀ NGHỊ KIỂM TRA HK I NĂM HỌC 2010 – 2011 TIẾNG ANH 12 – TEST 7 I. Choose A, B, C or D that best completes the following passage. In the United ... contaminated and this has led to the disappearance of some species of fish in Europe, USA . Because the contaminants are carried long distances, the sources of acid rain are difficult to pinpoint ... and hence difficult to control. 9. This passage is mainly about_________. A. air pollution that is another effect of acid rain. B. the phenomenon of air pollution. C. acid rain that is one of...