第5题:[单选题]The drinking water has become contaminated with lead. A.polluted B.treated C.tested D.corrupted 参考答案:A 本句意思：饮用水被铅污染了。contaminate意为“把……弄脏，污染”，与pollute（污染） 意思相近。treat对待，看待; test考试；测验，考查；corrupt使道德败坏；使腐败。
A. widespread concern over its harmful effects B. great panic over the mental disorder it could cause C. an intensive research into stress-related illnesses D. popular avoidance of stressful jobs 参考答案:A 答案解析:根据文章第二段第二句话“And millions of Americans who work and live under stress worried over the reports．”可以看出，
