问题补充：
Many people think that water will never be used up（用尽）because there are many rivers and lakes. And the rain can make us get enough fresh water. Also, we can dig wells（井）to find fresh water under the ground. In fact, it is wrong and dangerous to think so. In some areas, people fight（争斗）for fresh water. There is little rain there all year round. Let’s look around us. Some factories pour（倒）dirty water into rivers. And some people drop litter into rivers. We see polluted water here and there. We must do something to help people understand about preventing water from being polluted. It’s never too late if we take action right now.
【小题1】Fresh water is from .A．rivers and lakesB．rainC．wellsD．A, B, and C【小题2】It’s dangerous and wrong to .A．get enough fresh waterB．think water is endlessC．dig a wellD．use up water【小题3】What do people fight for in some areas? A．Fresh water.B．Little rain.C．Pouring dirty water.D．Money.【小题4】What’s the main idea?A．Water will never be used up.B．How to find fresh water.C．Water is everywhere.D．Shortage（短缺）of fresh water.D
答案：
(答案→)D
解析：
【小题1】根据文章内容Many people think that water will never be used up（用尽）because there are many rivers and lakes. And the rain can make us get enough fresh water. Also, we can dig wells（井）to find fresh water under the ground.可知答案为D
【小题2】根据文章内容we can dig wells（井）to find fresh water under the ground. In fact, it is wrong and dangerous to think so.可知答案为B
【小题3】略
【小题4】根据文章内容We must do something to help people understand about preventing water from being polluted. It’s never too late if we take action right now.故选答案为D
