4.Resources

Resources are found in nature.They make a better quality of life for humans.Soil，air，water，sunlight and trees are all examples of resources that humans use every day，whether they know it or not.26________

A natural resource is a material found in nature and used by living things.Air，rocks，metals，oil and salt are all natural resources.Renewable(可再生的)resources are resources that can be replaced.27________ Trees that are cut down can be replaced quickly when seeds or baby trees are planted.Water from our bathtubs(浴盆)can be cleaned for use.Plants，wind and rain can help clean the air to make it safe to breathe even if it comes out of a car or a factory.

Sometimes resources cannot be replaced after they are used.28________Once nonrenewable resources are all used up，nature will not be able to replace them.Oil，natural gas，soil and metals are all examples of nonrenewable resources.

Coal is another example of a nonrenewable resource.29________ Humans mine the coal underground and use it as an energy source.Once humans have mined all the coal from inside Earth，there will be no more for us to depend on.30________ For example，wind and water turbines(涡轮机)are now being used to produce energy.

26.________

A.These are called nonrenewable resources.

B.They replace some of the need to burn coal.

C.It is made by nature deep in Earth.

D.Without resources，humans could not live on Earth.

E.Trees，air，water and energy from the sun are renewable resources.

F.Luckily，humans are finding new ways to replace coal.

【答案】D

【解析】本文主要讲述的是自然资源的重要性，以及人类正在寻找新的方式来代替不可再生资源。文章第一段讲述了自然资源的重要性，指出土壤、空气、水、阳光、树木等自然资源给人类提供了更好的生活质量，没有了它们，人类就不能生活。接着第二段讲述了什么是可再生资源及其作用。第三段讲述了什么是不可再生资源。最后一段讲述了人类正在寻找新的方式来替代煤这个不可再生资源。

　　选项含义简单概括：（A）这些被称为不可再生资源。（B）他们取代一些需要去烧煤。（C）它是由地球深处的物质形成的。（D）没有了资源，人类不能在地球上生活。（E）树木、空气、水和太阳能是可再生资源。（F）幸运的是，人类正在寻找新的方式来代替煤。

　　本题空格前一句讲述的是不管人类知不知道，土壤、空气、水、阳光和树木都是人类每天使用的资源。D项讲的是没有了资源，人类就不能在地球上生活，与上文衔接最紧密，故选D。

27.________

A.These are called nonrenewable resources.

B.They replace some of the need to burn coal.

C.It is made by nature deep in Earth.

D.Without resources，humans could not live on Earth.

E.Trees，air，water and energy from the sun are renewable resources.

F.Luckily，humans are finding new ways to replace coal.

【答案】E

【解析】空格前一句讲述的是可再生资源的定义。E项讲的是树木、空气、水和太阳能是可再生资源，与上文衔接最紧密，故选E。

28.________

A.These are called nonrenewable resources.

B.They replace some of the need to burn coal.

C.It is made by nature deep in Earth.

D.Without resources，humans could not live on Earth.

E.Trees，air，water and energy from the sun are renewable resources.

F.Luckily，humans are finding new ways to replace coal.

【答案】A

【解析】空格后一句讲述的是不可再生资源的情况。A项讲的是什么是不可再生资源，与下文衔接最紧密，故选A。

29.________

A.These are called nonrenewable resources.

B.They replace some of the need to burn coal.

C.It is made by nature deep in Earth.

D.Without resources，humans could not live on Earth.

E.Trees，air，water and energy from the sun are renewable resources.

F.Luckily，humans are finding new ways to replace coal.

【答案】C

【解析】空格前一句讲述的是煤是一种不可再生资源。C项讲的是煤是如何形成的，与上文衔接最紧密，故选C。

30.________

A.These are called nonrenewable resources.

B.They replace some of the need to burn coal.

C.It is made by nature deep in Earth.

D.Without resources，humans could not live on Earth.

E.Trees，air，water and energy from the sun are renewable resources.

F.Luckily，humans are finding new ways to replace coal.

【答案】F

【解析】空格后一句讲述的是人类正在使用风和水轮机来产生能量。F项讲的是人类正在寻找新的方式来代替煤，与下文衔接最紧密，故选F。