1、Scientists found that climate change became more and more unusual inrecent years, not only may it cause many problems such as global warming, nature calamities, and so on, but also it can affect your life。 Unusual climate change would let you feel uncomfortable, and affect your study and work。 Therefore, everyone has responsibility to pay attention to it; furthermore, you need to do everything in your power to make the climate better and better。 However, at first, you need to understand two things: the meaning of climate change, and two important factors of climate change: natural causes, and human causes。 This essay is going to talk about these two things。
2、At first, you must understand the meaning of climate change。 It means any long-term significant change in the average weather, which may include average temperature, precipitation, wind patterns and so on。 For example, Australia is experiencing rapid climate change。 Since the middle of the twentieth century, Australian temperatures have risen by about average one temperature degree with an increase in the frequency of heat waves and a decrease in the numbers of frosts and cold days。 Rainfall patterns have also changed, which means that the northwest has seen an increase in rainfall over the last fifty years while much of eastern Australia and the far southwest have experienced a decline。 From this example, it indicates climate change that is occurring today has sped up, and affects long-term weather。 The Earth’s climate is largely affected by how much heat is stored in the atmosphere。 Furthermore, the climate change is caused by dynamic process on Earth, external forces including variations in sunlight intensity, and more recently by human activities。
3、The most important reason of climate change is caused by humans, because humans produce a lot of carbon dioxide into the air。 This carbon dioxide emits from fossil fuel, aerosols, cement manufacture, land use, animal agriculture and deforestation。 For example, trees can take in carbon dioxide to produce oxygen by photosynthesis。 If people cut many trees for making furniture, paper, or sell wood to make money, there is much more carbon dioxide in the air。 Beginning with the industrial revolution in the nineteenth century and accelerating ever since, the human consumption of fossil fuels has raised carbon dioxide levels rapidly。 It means that carbon dioxide levels are substantially higher now than before。 On the other hand, during the procedure of manufacturing cement, which is used in buildings, significantly more carbon dioxide is produced。 While people improve their living standard, they cause climate change。 When people burn coal, oil, and gas for our electricity, carbon dioxide is produced。 When people burn fossil fuel to move vehicles, carbon dioxide is also produced。 These sorts of examples indicate that humans are the real culprit。 They do not consider the consequence, while they enjoy producing every thing they want。
4、It is not just man-made pollution of the atmosphere which can cause climate change。 Changes in the amount of carbon dioxide in the air have occurred naturally during the history of the Earth, leading to climate changes。 When a volcano erupts, it releases huge amounts of carbon dioxide and sulfur dioxide into the atmosphere。 However, volcano eruptions cannot effect climate change。 The main reason is that before the volcano erupts, it would release huge amount of carbon dioxide and sulfur dioxide for a very long time。 This pollution injected into the air blocks out a lot of sunlight。 Therefore, it can cause the Earth to cool over fewer years。 For example, in April 1991 eruption of Mount Pinatoba, where is in the Philippine islands, emitted huge amounts of carbon dioxide and sulfur dioxide into the air。 The movement of the Earth’s axis also affects climate change; it moves a little more than a half-degree each century。 Other processes can change the Earth’s climate over millions of years。 When not only continents move around the world, but also mountains ranges are built, the changing patterns of landmasses affect the way the heat in the atmosphere and in the oceans is stored。 In addition, changes in the way ocean water circulates around the world can affect the climate, because the oceans store even more heat than the atmosphere。 Once ocean currents change direction, slow down, or reverse, it has a significant impact on climate。
5、Climate change is mainly caused by carbon dioxide。 This can be separated to two important parts: natural causes, and human causes。 After we realise what the two important factors of climate change are, and what the climate change is, we could try to think of a more effective solution to solve the climate change problem to make a higher quality environment。
1、直接法-即直接利用相关语法知识，通过题干中的已供信息，捕捉到解题线索，从而得出正确答案的解题方法，例：
—— Will you come to the net bars(网吧)with me?
—— Sorry、My mother always tells me______ there.
A、not go B、go C、not to go D、to go
根据句意可知此题考查动词不定式的否定形式，即tell sb、not to do sth.，故此题应选C。
2、关键词法-许多题目中都有这样一些词，它们对于快速而准确地判定答案起着至关重要的作用。我们称这些词为关键词(key words)。找到句中的关键词，也就找到了解题的突破口，例：
He hardly hurt himself in the accident， ______?
A、doesn‘t he B、didn’t he C、did he D、does he
该题中hardly与hurt是起关键词作用的。凡陈述部分含有hardly， never， little， few等否定意义的词时，反意疑问句用肯定形式;而hurt一词的过去式与原形相同，此处hurt未加s，应为过去式。因此本题答案C是正确的。
3、类推法-如果对题目的备选答案没有十分把握或把握很小，不妨利用“如果A对，那么B也对”的类推法，从而可将A、B予以否定，例：
—— Who‘s the man at the door?
——______ .
A、He is a doctor B、He is a friend of mine
C、He is a famous singer D、He is twenty
仔细分析备选答案就可发现：A、C选项针对的是“职业”。若A是对的，那么C也会是对的。D回答的是年龄。故惟有B才是正确的。
4、前后照应法-此方法多用于两个以上句子或对话形式命题的题目。解题前，透彻理解，然后联系上下文，捕捉隐含信息，方能准确找出答案，例：
—— He isn‘t a teacher， is he?
—— ______、He works in a hospital.
A、Yes， he is B、No， he isn‘t C、Yes， He isn’t D、No， he is
本题考查否定句的反意疑问句的回答。由后半句的回答，我们知道“他”的身份不是教师;否定反意疑问句回答中的Yes其实际含义为“不”，No的实际含义为“是”。因此应选择的是B。
5、排除法-根据题干提供的信息，先把一眼就看出的干扰项排除，缩小选择范围，然后将剩余的选项填入空白处进行检验，辨别真伪，例：
The girl asked the teacher ______.
A、what does the museum looks like B、what did the museum look like
C、what the museum looks like D、what the museum looked like
本题主要考查宾语从句中的语序及时态的对应关系。主句动词是过去时，从句的谓语动词也应是过去时的某种时态，故A、C被排除。而B中有词序错误，所以D为正确答案。
6、交际法-此方法可用30个交际用语，联系上下文直接解题，例：
—— Would you like to have another cup of tea?
—— ______.
A、Yes， I do B、Not al all C、No， thanks D、Help yourself
本题主要考查简答交际用语的应答。对别人的邀请，如果表示不接受时，应委婉说出，不能断然拒绝。因此，选C是最佳答案。
1、in Class One，Grade One 在一年级一班
2、play ball games 进行球类活动
3、read books 读书
4、in summer 在夏季
5、have ones class 上课
6、on the playground 在操场上
7、every day 每天
8、the first class 第一节课
9、be interested in 对…感兴趣
10、his friend 他的朋友
11、go to the zoo 去动物园
12、collet stamps 集邮
13、make model cars 制作汽车模型
14、take pictures 照相
15、grow roses 种植玫瑰
16、go fishing 去钓鱼
17、Chinese food 中国食物
18、my parents 我的父母
19、two American boys 两个美国男孩
20、a new student 一名新生
21、study English 学英语
22、thank you 谢谢
23、in China 在中国
24、speak Japanese 讲日语
25、very well 很好
26、only a little 只有一点
27、a department store 百货商店
28、of course 当然可以
29、try on 试穿
30、have a look at看一看
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