阅读下面的短文．并根据短文后的要求答题。

Since 1850．the temperature of Earth’s surface has increased about 0.6°C．Scientists predict it may warm much more by the end of this century．Who’s turning up the heat? Well, it seems that we are! Some of this global warming may be natural．However，nearly all scientists now agree that most of it is due to peoples actions．Over the past 150 years, we've added huge amounts of certain gases, especially carbon dioxide（CO2）to the air．These gases can keep heat near Earth's surface，so more carbon dioxide means more heat is kept near Earth's surface．Global warming may change the weather in ways that lead to more severe storms，floods and droughts．

We add carbon dioxide to the air when we burn things, especially fossil fuels．Fossil fuels are energy sources formed from the remains of plants and animals that lived millions of years ago．Coal，oil，and natural gas are all fossil fuels．People in the United States and other countries started bunting large amounts of fossil fuels more than a century ago．The amount d fossil fuels being burned each year has been increasing worldwide．The more we burn，_____________________．

What can we do to help? Nowadays to live a low-carbon life is quite popular in the world． Low-carbon means to reduce the amount of carbon dioxide．Saving energy and reusing are the key words. In fact, even the simplest everyday activities can make our lives low-carbon．

1．What problem can global warming cause?（根据短文内容回答问题）

2．What are fossil fuels?（同上）

3．请将第一段中的划线句子翻译成汉语。

4．请根据第二段内容，将最后一个句子补充完整。

The more we bum，_____________________________________________.

5．请写出日常生活中的一种“低碳”行为（用英语写一个句子）。

We all need a healthy environment, but we produce waste every day and it does harm to our environment. Though we are young, we can still do something to help. In fact, even the simplest everyday activities can make a real difference to the environment. Here are some ideas for you to live a green life.

Remember these three words: reduce, reuse and recycle.

Reduce means “use less”. Don't waste things. This saves money and reduces pollution and waste going into the environment. Before we buy something new, think if it is really necessary or maybe the old one will be just as good! When we do buy things, choose local products if possible, and try not to buy too many things from abroad.

Reuse means “use again”. Use things for as long as possible. When we buy things, make sure that they last a long time. We should take care of them so that they will last, and we should repair them if we can instead of throwing them away and buying new ones. Don't use a paper cup or a paper bag. It’s better to use a china cup and a lunch box because you can use them again.

Recycle means “change things into something else”. Although it takes energy to change something into something else, it’s better than throwing things away or burning them. Find out what can be recycled in your neighbourhood and take part in recycling programmes. We should also buy products made from recycled materials, such as recycled paper, to help save trees.

Title:  46   to Live a Green Life

完形填空（二）（本题共15小题，满分30分）
阅读下面短文，根据文意，将方框内所给的词或短语的适当形式填入相应的空白处，使短文的意思完整。（每个词只能使用一次）（本题共十小题，每小题2分，满分20分）

We all need a healthy environment, but we produce waste every day and it__【小题1】__ our environment. Though we are young, we can still do something to help. In fact, even the simplest _【小题2】__activities can make a real difference to the environment. Here are some ideas for you.
Reduce means “use less”. Don’t waste things. This __【小题3】__money and reduces pollution and waste going into the environment. Before we buy something new, think ___【小题4】____it is really necessary—or maybe the old one will be just as good! When we do buy things, choose local products if __【小题5】_____ and try not to buy too many things from abroad.
Reuse means “use again”. Use things for as long as possible. When we buy things, make sure that they __【小题6】__ a long time. We should look after them__【小题7】_ they will last and we should repair them if we can instead of  throwing them away and buying new ones. Don’t use a paper cup or a paper bag. It’s better to use a china cup and a lunch box because you can use them __【小题8】__.
Recycle means “change things into something else”. Although it takes ___【小题9】_ to change something into something else, it’s better than throwing things away or burning them. Find out what can be recycled in your_【小题10】__ and take part in recycling programmes. We should also buy products made from recycled materials, such as recycled paper, to help save trees.