问题2选项
A.A cocktail of vitamins.
B.A cocktail of vitamins plus magnesium.
C.The combination of vitamins A, C and E
D.The combination of minerals.
问题3选项
A.The delicate structures of the inner ear.
B.The inner ear cells.
C.The eardrums.
D.The inner ear ossicles.
问题4选项
A.General Motors (通用汽车公司).
B.The United Auto Workers (汽车工会).
C.NIH.
D.All of above
问题5选项
A.An industrial trial in Spain.
B.Military trials (军事审判) in Spain and Sweden.
C.Industrial trials in Spain and Sweden.
D.A trial involving students at the University of Florida.
21. According to the talk, how many victims of hearing problem are there in the United States alone? 【解析】原文一开头便提到：About 10 million people in the U.S. Alone…are suffering from impairing noise-induced hearing loss，即听力受损的大约有1000万人。
第2题:
22. Which did UM Cresgo Hearing Research Institute develop to prevent hearing loss? 【解析】原文中说该研究采用的是“combination of vitamins A, C and E plus magnesium”，选项B“维生素和镁的混合药”正确。
第3题:
23. According to the latest findings, what does loud noise damage? 【解析】文中提到“It was then discovered that noise caused intense metabolic activity in the inner ear and production of molecules that damage the inner ear cells”，即噪音产生的原子能损害内耳的细胞。
第4题:
24. According to the talk, who supported the lab research? 【解析】题目问这一研究由谁支持，文中提到了NIH国家卫生研究所。
第5题:
25. Which of the following is not included as the multinational human clinical trials for Oral Quell? 【解析】题目问哪一个不属于多国人类临床试验，只有C选项与原文不一致。
原文：
(21) About 10 million people in the U.S. alone, from troops returning from war to students with music blasting through headphones are suffering from impairing noise-induced hearing loss. The rise in trend is something that researchers and physicians at the University of Michigan Cresgo Hearing Research Institute are hoping to reverse, with the cocktail of vitamins and the mineral magnesium (镁) that shall promise as a possible way to prevent hearing loss caused by loud noise. The nutrients were successful in laboratory tests. And now researchers are testing whether humans will benefit as well. (22) The combination of vitamins A, C and E plus magnesium is given on pill form to patients who are participating in the research. Developed at the UM Cresgo Hearing Research Institute, the medication, called Oral Quell, is designed to be taken before a person is exposed to the loud noise. Until a decade ago, it was thought that noise damaged hearing by intense mechanical vibrations that destroyed delicate structures of the inner ear. There was no intervention to protect the inner ear other than reducing the intensity of sound reaching it, such as ear plugs which are not always effective. (23) It was then discovered that noise caused intense metabolic activity in the inner ear and production of molecules that damage the inner ear cells. And that allows the discovery of intervention to prevent these effects. (24) The laboratory research that led to a new understanding of mechanisms underlying noise-induced hearing loss was funded by NIH, the Preclinical Translation Research that led to the formulation of Oral Quell as effective preventative was funded by General Motors and the United Auto Workers. Now Oral Quell is being tested in a set of four multinational human clinical trials: (25) military trials in Sweden and Spain, and industrial trials in Spain and the trial involving students at the University of Florida who listen to music at high volumes on their iPods and other PDAs.
