一．阅读理解（2*8=16）
A
Since the beginning of the year, smog has covered parts of North China. In January, Beijing saw only five days without smog. The rising PM 2.5 readings terrified many people, and some health experts said that whenever the smog gets serious, hospitals receive more patients suffering acute respiratory（呼吸系统）and heart diseases.
Later, news of polluted underground water in some provinces scared people who wondered whether the water they drink is safe.
