1 . Despite the bad reputation of sharks, they are crucial to the health of the marine ecosystem and can even help fight climate change.

In the shallows of Shaik Bay, Western Australia, seagrass is food for the sea cows, which can weigh as much as 500 kg and eat roughly 40 kg of seagrass a day. Sea cows are a rich source of food for tiger sharks. By keeping the sea cow population controlled, tiger sharks here help the seagrass grow sustainably. A booming seagrass meadow stores twice as much CO₂ per square mile as forests typically do on land.

But tiger shark numbers are declining. Off Australia’s northeast coast of Queensland, tiger sharks are estimated to have fallen by at least 71 percent, largely due to overfishing. A reduction in tiger sharks means more seagrass consumed by herbivores (食草动物) and less carbon stored in sea vegetation. This raised the question: What if they were absent from the Shark Bay — would the seagrass-dominated ecosystem survive?

To find out, researcher led by Rob Nowicki of Florida International University, spent time in Eastern Australia, where shark numbers were lower and sea cows ate seagrass largely undisturbed. “When uncontrolled, sea cows can rapidly destroy wide areas of seagrass.” said Nowicki.

Those findings emphasized that tiger sharks were playing an important role in preventing the reduction of seagrass in Shark Bay. If their populations continue to decline, the resilience of carbon-rich ocean ecosystems will likely decrease.

          When it comes to stimulating shark numbers, there have been movements toward more sustainable fishing, but a large percentage of the industry have not changed their methods, which is a reason why the population of many marine top predators (捕食者) continues to decline.

Aside from supporting sustainable fishing, Nowicki said the only way to truly protect marine life is to reduce our global greenhouse gas emissions. “Ultimately, if we are going to protect our ecosystems in the centuries to come, we are going to need to solve climate change while undertaking species protection at the same time.”

1. Why are tiger sharks vital to the marine ecosystem?

A．They feed on various sea animals.	B．They can store large amounts of CO₂.
C．They can prevent the loss of seagrass.	D．They influence marine species’ health

2. What does the underlined word “resilience” in Paragraph 5 mean?

A．Remark.

B．Recovery.

C．Bother.

D．Accident.

3. What is the main cause of the population reduction of many top predators?

A．Unsustainable fishing.	B．Lack of protection.
C．Climate change.	D．Loss of seagrass.

4. What’s the purpose of the text?

A．To tell the number of tiger sharks is decreasing.

B．To show climate change causes the loss of seagrass.

C．To tell environmental protection is at the top of the agenda.

D．To show tiger sharks are vital to the health of the marine ecosystem.

2 . Ninety-seven percent of Earth’s water is ocean. No blue, no green. If you think the ocean isn’t important, imagine Earth without it. Fifty years ago, when I began exploring the ocean, no one realized that we human being could do anything to harm the ocean.

For me, as a woman scientist, it all began in 1953 when I first tried diving. In 1979, by using a submersible, I had a chance to reach the ocean floor which was six miles offshore and 1,250 feet down. Since then, I’ve used about 30 kinds of submarines. We need new deep-diving submersible. We need to see the undersea mountains and understand life in the deep sea. Exploring and protecting the wild ocean is my big wish.

What’s worrying us is that an ice free Arctic Ocean may happen in this century. That’s bad news for the polar bears. Additional CO₂ is not only driving global warming, but also changing ocean chemistry, making the sea more acidic. That’s bad news for coral reefs and oxygen-producing plankton(浮游生物). Actually, nearly half of the coral reefs have disappeared. We’re putting hundreds of millions of tons of plastic and other rubbish into the sea. We’re blocking the ocean, poisoning the planet’s circulatory system. Most of the turtles, sharks, tunas and whales are way down in numbers. All of these are part of our life support system.

Health to the ocean means health for us. I wish we would use all means—films, explorations, the web, new submarines—and campaign to stimulate public support for ocean protected areas. My wish is a big wish, but if we can make it happen, it can truly save and restore the ocean, the blue heart of the planet. For the children of today, for tomorrow’s children: as never again, now is the time.

1. Why does the writer say “No blue, no green.” in the first paragraph?

A．To tell us the colors of the earth.	B．To refer to the ocean and the land.
C．To show the importance of ocean.	D．To encourage us to explore the ocean.

2. What should we do to protect the ocean according to the text?

A．Make joint efforts.	B．Save life support system.
C．Encourage children to take action.	D．Explore the ocean by new technology.

3. What’s the writer’s attitude towards the current situation of the ocean?

A．Negative.

B．Concerned.

C．Uncertain.

D．Indifferent.

3 . 假设你是某中学的学生李华，最近参加了学校的“低碳生活社”。现在请根据社团有关章程，用英语写一封电子邮件给你的美国好友Jack，介绍你们社团及其活动情况。提示：

社团名称	低碳生活社
社团宗旨	低碳生活，从我做起
成员义务	衣：衣着朴素，收集旧衣赠灾区人民 食：在饭堂吃饭时按量取食，吃天然或简单包装食品 住：少用空调，使用节能灯，循环用水、纸张等 行：步行、骑自行车或使用公共交通工具 玩：选择能源消耗少的娱乐，如爬山、游泳、打球等

注意：1.可以适当增加细节，以使行文连贯；
2.词数不少于100(开头已给出，但不计入总词数)。
Dear Jack,

How have you been? I’m glad to tell you that I have recently joined the “Low-carbon Living Club” in our school.

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Truly,

Li Hua

4 . 假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者（从第11处起）不计分。

Last Thursday, we have had a class meeting to discuss where to go for our autumn trip. We came up with several choices such as going boating, climbing a mountain, and going to park. Finally, we decided to go mountain climbing. The next day, we left to the mountain early in the morning. While climbing the mountain, we enjoyed the warm sunshine and the beautiful sceneries. However, when we reached the top, we were shocking to see rubbish here and there, such as bottles and banana peels. We felt sadly that many tourists didn’t take good care of nature. Soon, they started to pick them up. With all the rubbish putting in the rubbish bin, the place looked many more beautiful than before. When we came back, it was 5:30 in the afternoon. We were tired and happy.

5 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Scientists in Antarctica have made a surprising and welcome     1     (discover) — the world’s largest breeding ground for fish. Researchers from Germany came across the fish while     2     (make) a map of the seabed of the Antarctic Weddell Sea. They found around 60 million ice-fish breeding in an area about 240 square kilometers. The research team had been setting down a number of     3     (camera) to a depth of 530 meters under the Wed-dell Sea for months. “Such a huge breeding area of ice-fish in the Weddell Sea was     4     (previous) undiscovered, and it is totally attractive,” said Autun Purser,     5     deep-sea biologist.

The researchers have been exploring the region hoping     6     (establish) it as an official Marine Protected Area. They say the seas are a unique habitat that must     7     (preserve). They want to keep fishing and some other scientific research from     8     (pollute) the waters. A recent University of Cambridge study found that fishing in Antarctica is bringing millions of other species from 1,500 ports around the globe,     9     are threatening the area’s special eco-system. Antun said, “So far, the remoteness and difficult sea-ice conditions of Antarctica have protected it, but we must keep     10     mind that we should be very careful with oceanic conservation.”

7 . 假设你是学校学生会的一员，为了拥有一个更美好的校园，你发出了全员环保的倡议，并制作了如下图的海报：

请根据海报内容及以下要点写一份倡议书。
1.环保是我们中学生义不容辞的责任；
2.我们应该养成这些环保习惯；
3.让我们人人都为地球母亲尽一份绵薄之力吧！
注意：1.可适当增加细节，以使行文连贯；
2.词数：不少于100词。
Dear friends,
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Thank you!

The Students’ Union

8 . A young Dutch inventor is widening his effort to cleanup floating (浮动的) plastic from the Pacific Ocean. He has developed a floating device (设备) to trap plastic waste moving into rivers before it reaches the oceans.

Boyan Slat was just 18 years old when he invented a system for catching waste in the ocean. He also founded an environmental group called “The Ocean Cleanup”. Its purpose is to develop the system. Last year, Slat showed the next step: a floating device which is called Interceptor. It removes plastic out of rivers. The device is powered by energy from the sun. “The 1,000 rivers are responsible for about 80% of plastic going into the world’s oceans,” said Slat. Three of the machines have already been used. Each machine costs about $775, 660, but the cost might drop as production increases.

Since they were used, the machines have been doing very well, collecting the plastic bottles and all the rubbish in the rivers. According to Slat, it is necessary to close “the tap”, which means preventing more plastic from reaching the ocean in the first place. He wanted to clean them all in the next five years. “This is not going to be easy, but if we do get this done, we could truly make our oceans again, ”said Slat.

The device is designed to be safe in rivers. Its nose is shaped to change directions to keep it away from larger floating things. It works by guiding plastic waste into an opening in the front of the device. The waste is then carried inside the machine where it is dropped into containers. The devices ends a text message to local operators that can come and empty it when it is full.

1. What do we know about Interceptor?

A．It needs solar power to work.	B．It is mainly used in the oceans.
C．It is being under test.	D．It can help sort waste.

2. What does “the tap” refer to in Paragraph 3?

A．The waste.	B．The oceans.
C．The machines.	D．The rivers.

3. What’s the function of the device’s nose?

A．To ensure the device’s safety.	B．To send operators text messages.
C．To empty the waste.	D．To serve as containers.

4. Where is the text most likely from?

A．A novel.	B．A magazine.
C．A diary.	D．A guidebook.