Just as the world’s most respected scientific bodies have confirmed that the world is getting hotter, they have also stated that there is strong evidence that humans are driving the warming. Countless recent reports from the world’s leading scientific bodies have said the same thing. For example, a 2010 summary of climate science by the Royal Society stated that: “There is strong evidence that the warming of the Earth over the last half-century has been caused largely by human activity.”

The idea that humans could change the planet’s climate may be counter-intuitive (與直覺(jué)不符的), but the basic science is well understood. Each year, human activity causes billions of tons of greenhouse gases to be released (釋放) into the atmosphere. As scientists have known for years, these gases hold heat that would otherwise escape to space, wrapping the planet in an invisible blanket.

Of course, the planet’s climate has always been changing thanks to “natural” factors such as changes in solar or volcanic activity, or cycles relating the Earth’s going around the sun. According to the scientific literature, however, the warming recorded to date matches the pattern of warming we would expect from a build-up of greenhouse gas in the atmosphere – not the warming we would expect from other possible causes.

Even if scientists did discover another reasonable explanation for the warming observed so far, that would beg a difficult question. As Robert Henson puts it in The Rough Guide to Climate Change: “If some newly discovered factor can account for the climate change, then why can’t carbon dioxide and the other greenhouse gases?

The only way to prove with 100% certainty that humans are responsible for global warming would be to run an experiment with two identical Earths – one with human influence and one without. That obviously isn’t possible, and so most scientists are careful not to state human influence as an absolute certainty．

1.In most scientists’ opinion, the global warming is mainly caused by ____ ．

A. solar activity

B. volcanic activity

C. the Earth’s going around the sun

D. human activity

2.The text is developed by ____ ．

A. giving typical examples

B. following the order of space

C. analyzing a theory and arguing it

D. comparing and finding differences

3.The underline word “identical” means ____ ．

A. totally different B. exactly the same

C. extremely important D. relatively independent

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完形填空

Joe Simpson and Simon Yates were the first people to climb the West Face of the Siula Grande in the Andes mountains. They reached the top________, but on their way back conditions were very ________. Joe fell and broke his leg. They both knew that if Simon________ alone, he would probably get back________ . But Simon decided to risk his ________ and try to lower Joe down the mountain on a rope（繩）.

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Simon had________ the camp at the foot of the mountain. He thought that Joe must be , but he didn’t want to leave ________ . Three days later, in the middle of the night, he heard Joe’s voice.

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1.A. hurriedB. carefullyC. successfullyD. early

2.A. difficultB. similarC. specialD. normal

3.A. climbedB. workedC. restedD. continued

4.A. unwillinglyB. safelyC. slowlyD. regretfully

5.A. fortuneB. timeC. healthD. life

6.A. layB. settledC. wentD. looked

7.A. damageB. stormC. changeD. trouble

8.A. by mistakeB. by chanceC. by choiceD. by luck

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10.A. heightB. weightC. strengthD. equipment

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15.A. runB. skateC. moveD. march

16.A. aroundB. awayC. aboveD. along

17.A. headed forB. traveled toC. left forD. returned to

18.A. deadB. hurtC. weakD. late

19.A. secretlyB. tiredlyC. immediatelyD. anxiously

20.A. findB. believeC. makeD. accept

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One afternoon many years ago, I sat down on a chair in a park and watched a little boy, around 2 years old, 1. (run) freely on the grass as his mother watched from a short distance．The boy would fall to the grass, get up, and without looking back at his mother, run as fast as he could as if nothing 2. ( happen)．

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單句改錯(cuò)

下面每個(gè)句子都有一處錯(cuò)誤，每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。

1. 增加：在缺詞處加一個(gè)漏字符號(hào)（∧），并在其下面寫出該加的詞。

2. 刪除：把多余的詞用斜線（＼）劃掉。

3. 修改：在錯(cuò)的詞下劃一橫線，并在該詞下面寫出修改后的詞。

例如：

1. It’s exciting experience to swim in the sea.

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答題卡填寫方式如下：

1. It’s ^ → an 2. him 3. on → of

注意：1. 每處錯(cuò)誤及其修改均僅限一詞；

2. 將改正后的答案按要求寫在答題卡的相應(yīng)位置。

1.This is such an easy maths problem that everyone can work out.

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完形填空

閱讀下面短文，從短文后各題所給的四個(gè)選項(xiàng)（A、B、C、D）中，選出可以填入空白處的最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。

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Scientists have learned a lot about the kinds of food people need. They say that there are several kinds of food that people should eat every day. They are: (1) green and yellow vegetables of all kinds; (2) citrus（柑橘）fruits and tomatoes; (3) potatoes and other fruit and vegetables; (4) meat of all kinds, fish and eggs; (5) milk and foods made from milk; (6) bread or cereals（谷類食品）, and rice is also in this kind of food; (7) butter, or something like butter.

Paragraph 2

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Paragraph 3

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