Using too much water or throwing rubbish into our rivers are clear ways that humans can pu

Using too much water or throwing rubbish into our rivers are clear ways that humans can put our water supply in danger, but we also affect our water supply in less obvious ways. You may wonder how paving (铺砌) a road can lead to less useable fresh water. A major part of the water we use every day is groundwater. Groundwater does not come from lakes or rivers. It comes from underground. The more roads and parking lots we pave, the less water can flow into the ground to become groundwater.
Human activity is not responsible for all water shortages (短缺). Drier climates are of course more likely to have droughts (干旱) than areas with more rainfall, but in any case, good management can help to make sure there is enough water to meet our basic needs .
Thinking about the way we use water every day can make a big difference, too. In the United States, a family of four can use 1.5 tons of water a day! This shows how much we depend on water to live, but there’s a lot we can do to lower the number.
You can take steps to save water in your home. To start with, use the same glass for your drinking water all day. Wash it only once a day. Run your dishwasher (洗碗机) only when it is full. Help your parents fix any leaks (裂缝) in your home. You can even help to keep our water supply clean by recycling batteries instead of throwing them away.
【小题1】Which of the following is most likely to lead to less groundwater?【小题2】What can be inferred from the text?【小题3】The last paragraph is intended to . 【小题4】The text is mainly about .
A. why paving roads reduces our water
B. how much we depend on water to live
C. why droughts occur more in dry climates
D. how human activity affects our water supply

A. why paving roads reduces our water B. how much we depend on water to live C. why droughts occur more in dry climatesD. how human activity affects our water supply解析：文章大意：这是一篇关于用水问题的议论文。告诉我们，尽管大量用水和污染水源使人类用水处于危险境地，但是人类一些小型的活动也对用水问题有着巨大的影响。短文详细描写了生活中容易造成浪费的一些用水问题，并提出了相应的建议。【小题1】细节题，根据The more roads and parking lots we pave , the less water can　ｆlow into the ground to become groundwater. 可知选Ｃ。【小题2】细节题。根据第一段good management can help to make sure there is enough water to meet our basic needs及下文描述，可知要满足我们的用水需求需要很大的努力, 故选B。【小题3】细节题。根据You can take steps to save water in your home. 及本段描述，可知本段主要是针对如何节水提出建议，选Ｄ。【小题4】这篇短文主要描述了人类活动与水资源的关系，告诉我们如何来节约用水。故选Ｄ，人类活动如何影响我们的用水供应。

我明天再问问老师，叫他解释下这个问题