2 . 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。

According to Science Daily, the Arctic, the only natural habitat for polar bears, is in danger. Sea ice in the area could disappear    1    (complete) by 2035. This is undoubtedly bad news for the animal, as they use the floating sea ice to hunt.

Scientist made this    2    (predict) by using the UK Met Office’s Hadley Center climate model. This model allowed researchers    3    (compare) Arctic sea ice conditions during the last interglacial period-the warm period that     4    (occur) around 127, 000 years ago-to present day conditions. Researchers found during the last interglacial period many shallow pools of water formed on the surface of the Arctic sea ice. These pools     5    (know) as melt ponds, played a crucial role in the melting of the sea ice. This is because if there are larger areas of melt ponds, more heat    6    (absorb) by sea ice, which causes it to melt further.

In the last interglacial period, the Arctic sea ice actually disappeared. This is a    7    (frighten) thought for scientists     8    see the pattern repeating. “If what is happening to the Arctic right now is anything like the last interglacial period, there is     9    chance that it could be virtually free of sea ice in only 15 years,” the researchers said.

In addition     10    the potential extinction of some animal species, the melting of sea ice could cause devastating natural disasters.

3 . They say once you learn to ride a bike, you never forget. Most of us learned to ride when we were kids, and many still wear our helmets, put our feet on the pedals, and shoot off for a ride on the streets. In recent times, cycling has seen an increase in popularity, so many people raise a question:     1    

First, let’s look at the health benefits. Cycling can improve your cardiovascular (心血管的) health and burn extra body fat. Strengthening your muscles in your legs helps increase your potential torque (扭矩) and cadence (节奏).     2     A long ride in the countryside could help you clear your mind, or de-stress. But it’s not only about your body and mind there are also some plus sides for your wallet’s health.

Cycling can be a great way to go to work or get about town.     3     If you drive to work, sometimes finding somewhere to park can be a nightmare, whereas finding somewhere to chain your bike up can be much simpler. Then, on the subway, there are changes at stations and other people who go to work speaking loudly on their phones to deal with.     4     And if you’re worried about safety, there are designated cycle lanes in many major cities. In addition, wearing high-visibility clothing is another way to improve your safety when cycling on the roads.

    5     It can help you reduce your carbon footprints. Not giving off greenhouse gases into the atmosphere is better for the planet and your own environment.

So, whether people want to cycle for their health, their wallet, the environment, or a combination of all of them —the popularity of cycling is on the rise.

A．What makes cycling so convenient?

B．But cyclists face neither of these issues.

C．And people will choose to go to work by cycling.

D．This can save you a lot of money on fuel or public transportation.

E．Finally, cycling can also be good for the environment.

F．And the benefits from cycling aren’t just physical, but mental as well.

G．What makes it so attractive for people to take their bikes once again?

6 . 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。

Dongying city in China’s Shandong Province has witnessed ecological improvements in the Yellow River Delta, thanks to various     1    (effect) measures to improve wetland restoration and protection.

Years ago, the wetlands there     2    (threaten) due to less water from the river and other factors.     3    (protect) the wetlands ecosystem, the Yellow River Delta National Nature Reserve was established in 1992. Since then, the city     4    (carry) out several management projects and restored the biotic (生物) population in the zone.

Dongying has been adopting a comprehensive wetlands restoration model by giving high priority to protecting the nature reserve and letting nature restore     5    (it) . Over the past three years, it’s transferred 469 million cubic meters of water to the nature reserve, which has recovered the ecological functions of the wetlands there.

Last year, Dongying built a real-time monitoring network for bird species at the nature reserve, which ensures that birds are free from disturbance of human activity and     6    (put) the habitats of cranes and other species under key protection. As     7    result, the nature reserve has seen an obvious increase in the variety and number     8    bird species. Home to 371 bird species, it’s become an important stop, wintering ground and breeding place for migratory     9    (bird). Dongying is currently working to build the Yellow River Estuary National Park,     10    will cover 3, 523 square kilometers, including land area and sea area, to explore pathways for the protection of Delta ecology.

7 . 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.

8 . Up to one fifth of the Amazon rainforest is emitting more carbon dioxide (CO₂), than it absorbs, new research suggests. Results from a decade-long study of greenhouse gases over the Amazon rainforest appear to show around 20% of the total area has become a net source of CO₂ in the atmosphere. One of the main causes is deforestation. While trees are growing, they absorb CO₂ from the atmosphere; dead trees release it again. However, the fact is that millions of trees have been lost to logging and fires in recent years.

The results of the study, which have not yet been published, have implications for the effort to combat climate change. They suggest that the Amazon rainforest, a vital carbon “store”, or “sink”, that slows the pace of global warming may be turning into a carbon source faster than previously thought. Every two weeks for the past 10 years, a team of scientists led by Professor Luciana Gatti, a researcher at Brazil’s National Institute for Space Research (INPE), has been measuring greenhouse gases by flying aircraft fitted with sensors over different parts of the Amazon basin. What the group found was startling: while most of the rainforest still retains its ability to absorb large quantities of CO₂ — especially in wetter years — one portion of the forest, which is especially heavily deforested, appears to have lost that capacity.

Gatti’s research suggests this south-eastern part of the forest, about 20% of the total area, has become a carbon source. “Each year is worse,” she told Newsnight. “We observed that this area in the south-east is an important source of carbon. And it doesn’t matter whether it is a wet year or a dry year. 2017 was a wet year, but it didn’t make any difference.”

A forest can become a source of carbon rather than a “store”, or “sink”, when trees die and emit carbon into the atmosphere. Areas of deforestation also contribute to the Amazon’s inability to absorb carbon.

Carlos Nobre, who co-authored Prof Gatti’s study, called the observation “very worrying” because “it could be showing the beginnings of a major tipping point”. He believes the new findings suggest that in the next 30 years, more than half of the Amazon could transform from rainforest into savanna (稀树草原).

1. Which of the following might Professor Luciana Gatti agree with?

A．Most of the Amazon rainforest absorbs more CO2 in wetter years.

B．The Amazon rainforest is on its way to becoming the biggest source of carbon.

C．Deforested areas tend to perform better in terms of absorbing carbon in dry years.

D．The Amazon rainforest has completely lost its ability to slow the pace of global warming.

2. What does the underlined word probably mean?

A．Striking.

B．Convincing.

C．Confusing.

D．Disgusting.

3. What part of the Amazon rainforest has lost most trees?

A．Northeastern.

B．Southwestern.

C．Southeastern.

D．Northwestern.

4. What might be talked about in the following paragraph? ______

A．Other worrying phenomena about the Amazon.

B．More explanations for the “Amazon tipping point”.

C．Other peopled opinions on effects of deforestation.

D．Comparison between old findings and new ones.

9 . 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。

As is known by us, our government is trying to make our city the National Civilized City at present. We hope we can also do our best to help realize this goal.

First of all, we should mind our words and deeds and become civilized citizens. Always remember to say “Please” and “Thanks” and don’t talk and laugh loudly in public. Seen people in trouble, we might as well to lend them a helping hand. In addition, be civilized pedestrians. We must observe traffic rules and never cross the streets before the traffic lights are red. At same time, keeping our environment cleanly is also advisable, it means we shouldn’t litter or spit in public places. Only by starting with the little things around us we make a great difference to our city image.

Let’s take measure now and make joint efforts to make our city more civilized.