“土壤是万物之本、生命之源”，是人类赖以生存的物质基础。2016年5月31日，国务院印发《土壤污染防治行动计划》。

某市一块10万平方公里的土地被镉、锰、铜等金属污染，引发居民对用水安全的担忧。有群众向政府发来邮件，指出政府不抓紧治理，有可能会对本市的水资源及空气造成严重污染。政府对此高度重视，立即召集专家进行分析论证，同时，举办社会听证会，听取大家的意见，最后市政府结合民众意见和建议，拿出了科学的治理方案，初步有效地防止了污染的扩大。

B

    An old man was going home late one night with his horse and cart after a day's hard work. When he was not far away from his house, the light on the cart went out. He tried but could not repair it. He was near his home, and so he went along the road without a light. When a policeman saw this, he stopped the old man.

    "Where is your light?" asked the policeman. "No man may take a cart along the road at night without a light. You know that. You have broken the law." "I had a light, but it has just gone out," said the old man.

    "I don't believe that story. What's your name and where do you live?" asked the policeman. "Please don't write down my name," said the old man. "My home is just there. You can see it from here. I had a light nearly the whole way."

    "You came all the way without a light. What's your name?"

    The old man quickly took the policeman's hand and put it down on the top of the light. The light was still hot and burnt the policeman's hand. The policeman jumped and he was very angry. "Now, what do you think?" said the old man. "Did I come all the way without a light?"

例：司机如果酒后驾驶，怎么能保证乘客的安全呢？

司机如果酒后驾驶，就不能保证乘客的安全。

难道钱塘江大潮不是“天下奇观”吗？

发芽的土豆只要不吃芽，其余的部分照样吃．