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)。
阅读下面的短文,并完成短文后的任务。

Draw a giraffe in your mind. How did you draw your giraffe? Does it have a long neck? Does it have long legs? Is it really tall? When people think of giraffes, they think of their long necks. A long neck and four long legs make the giraffe the tallest land animal on earth. A giraffe is 1.8m tall when it is born, and some giraffes get up to 6m tall when they are all grown up.
But did you know that giraffes also have long tongues? Have you seen the tongue of a giraffe before? A giraffe has a very long tongue which can hold and wrap (包) around objects. The tongue is designed for feeding, but it can be used in many different ways. For example, a giraffe can close its nose with its long tongue completely to keep out sand and dust. Also, a giraffe’s tongue is long enough to clean its owner’s ears as well!
The tongue is black in colour to protect it from getting sunburnt (晒伤). It is nearly 56cm long. Giraffe only eat plants, and a full grown giraffe can eat 33kg of leaves a day. When giraffes look for some tall trees to eat, they sometimes fight with elephants for food. Giraffes use their tongue to eat leaves from some tall trees. The giraffe’s tongue is a helpful tool for reaching leaves and breaking off branches.
任务一:根据短文内容回答下列问题。(注意:每题答案不超过10个单词)
【小题1】 What is this article mainly about?
_________________________________________________________________________
【小题2】What does a giraffe feed on?
_________________________________________________________________________ 
【小题3】 What color is the tongue of a giraffe? Why?
________________________________________________________________________ 
【小题4】Give two examples of the use of the giraffe’s tongue.
(1) ___________________________________ (2) __________________________________
【小题5】任务二:将文中划线的句子翻译成汉语。
________________________________________________________________________

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