第32题: [单项选择]People should be able to come to a decision about ions in the air if they ______. A. note their own reactions B. move to a healthier area C. observe domestic animals D. watch how wealthy people behave 参考答案:A 答案解析:细节题。
[解析] come to a decision是make up their own minds的同义转述,故可定位在末段倒数第二句话,意思和A)“注意他们的反应”正符合。