1 . Steven Stein likes to follow garbage trucks. His strange habit makes sense when you consider that he’s an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road. What is even more interesting is that one of Stein’s jobs is defending an industry behind the plastic shopping bags.

Americans use more than 100 billion thin film plastic bags every year. So many end up in tree branches or along highways that a growing number of cities do not allow them at checkouts(收银台). The bags are prohibited in some 90 cities in California, including Los Angeles. Eyeing these headwinds, plastic-bag makers are hiring scientists like Stein to make the case that their products are not as bad for the planet as most people assume.

Among the bag makers’ argument: many cities with bans still allow shoppers to purchase paper bags, which are easily recycled but require more energy to produce and transport. And while plastic bags may be ugly to look at, they represent a small percentage of all garbage on the ground today.

The industry has also taken aim at the product that has appeared as its replacement: reusable shopping bags. The stronger a reusable bag is, the longer its life and the more plastic-bag use it cancels out. However, longer-lasting reusable bags often require more energy to make. One study found that a cotton bag must be used at least 131 times to be better for the planet than plastic.

Environmentalists don’t dispute(质疑) these points. They hope paper bags will be banned someday too and want shoppers to use the same reusable bags for years.

1. What has Steven Stein been hired to do?

A．Help increase grocery sales.

B．Recycle the waste material.

C．Stop things falling off trucks.

D．Argue for the use of plastic bags.

2. What does the word “headwinds” in paragraph 2 refer to?

A．Bans on plastic bags.

B．Effects of city development.

C．Headaches caused by garbage.

D．Plastic bags hung in trees.

3. What is a disadvantage of reusable bags according to plastic-bag makers?

A．They are quite expensive.

B．Replacing them can be difficult.

C．They are less strong than plastic bags.

D．Producing them requires more energy.

4. What is the best title for the text?

A．Plastic, Paper or Neither

B．Industry, Pollution and Environment

C．Recycle or Throw Away

D．Garbage Collection and Waste Control

2 . By the end of the century, if not sooner, the world’s oceans will be bluer and greener thanks to a warming climate, according to a new study.

At the heart of the phenomenon lie tiny marine microorganisms(海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, leading to changes in the ocean’s appearance.

Phytoplankton live at the ocean surface, where they pull carbon dioxide(二氧化碳) into the ocean while giving off oxygen. When these organisms die, they bury carbon in the deep ocean, an important process that helps to regulate the global climate. But phytoplankton are vulnerable to the ocean’s warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, but also nutrients.

Stephanie Dutkiewicz, a scientist in MIT’s Center for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 3℃, it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, such as those of the Arctic, a warming will make conditions riper for phytoplankton, and these areas will turn greener. “Not only are the quantities of phytoplankton in the ocean changing. ” she said, “but the type of phytoplankton is changing.”

And why does that matter? Phytoplankton are the base of the food web. If certain kinds begin to disappear from the ocean, Dutkiewicz said, “it will change the type of fish that will be able to survive.” Those kinds of changes could affect the food chain.

Whatever colour changes the ocean experiences in the coming decades will probably be too gradual and unnoticeable, but they could mean significant changes. “It’ll be a while before we can statistically show that the changes are happening because of climate change,” Dutkiewicz said, “but the change in the colour of the ocean will be one of the early warning signals that we really have changed our planet.”

1. What are the first two paragraphs mainly about?

A．The various patterns at the ocean surface.

B．The cause of the changes in ocean colour.

C．The way light reflects off marine organisms.

D．The efforts to fuel the growth of phytoplankton.

2. What does the underlined word “vulnerable” in Paragraph 3 probably mean?

A．Sensitive.

B．Beneficial.

C．Significant.

D．Unnoticeable.

3. What can we learn from the passage?

A．Phytoplankton play a declining role in the marine ecosystem.

B．Dutkiewicz’s model aims to project phytoplankton changes.

C．Phytoplankton have been used to control global climate.

D．Oceans with more phytoplankton may appear greener.

4. What is the main purpose of the passage?

A．To assess the consequences of ocean colour changes.

B．To analyse the composition of the ocean food chain.

C．To explain the effects of climate change on oceans.

D．To introduce a new method to study phytoplankton.

4 . Baggy has become the first dog in the UK—and potentially the world—to join the fight against air pollution by recording pollutant levels near the ground.

Baggy wears a pollution monitor on her collar so she can take data measurements close to the ground. Her monitor has shown that air pollution levels are higher closer to ground level, which has helped highlight concerns that babies and young kids may be at higher risk of developing lung problems.

Conventional air pollution monitors are normally fixed on lampposts at about nine feet in the air. However, since Baggy stands at about the same height as a child in a pushchair（婴儿车）, she frequently records pollution levels which are much higher than the data gathered by the Environment A gency.

The doggy data research was the idea of Baggy's 13-year-old owner Tom Hunt and his dad Matt. The English youngster noticed that pollution levels are around two-thirds higher close to the ground than they are in the air at the height where they are recorded by the agency. Tom has since reported the shocking findings to the government in an attempt to emphasise that babies are at higher risk of developing asthma（哮喘）.

Matt Hunt said he was "very proud" of his son because “when the boy gets an idea, he keeps his head down and gets on with it, and he really does want to do some good and stop young kids from getting asthma."

“Tom built up a passion for environmental protection at a very early age," Matt added. “He became very interested in gadgets（小装置）. About one year ago, he got this new piece of tech which is like a test tube. One Sunday afternoon, we went out to do some monitoring, and he said, why don't we put it on Baggy's collar and let her monitor the pollution？'So we did it."

Tom said, "Most of the time, Baggy is just like any other dog. But for the rest of the time she is a super dog, and we are all really proud of her."

1. With a monitor on her collar, Baggy can ____________.

A．take pollutant readings	B．record pollutant levels
C．process collected data	D．reduce air pollution

2. What can we learn from the Baggy data?

A．High places are free of air pollution.

B．Higher pushchairs are more risky for kids.

C．Conventional monitors are more reliable.

D．Air is more polluted closer to the ground.

3. What is Tom's purpose of doing the research?

A．To warn of a health risk.	B．To find out pollution sources.
C．To test his new monitor.	D．To prove Baggy's abilities.

4. According to the passage, which word can best describe Tom Hunt?

A．Modest.

B．Generous.

C．Creative.

D．Outgoing.

5 . When a leafy plant is under attack, it doesn’t sit quietly. Back in 1983, two scientists, Jack Schultz and Ian Baldwin, reported that young maple trees getting bitten by insects send out a particular smell that neighboring plants can get. These chemicals come from the injured parts of the plant and seem to be an alarm. What the plants pump through the air is a mixture of chemicals known as volatile organic compounds, VOCs for short.

Scientists have found that all kinds of plants give out VOCs when being attacked. It’s a plant’s way of crying out. But is anyone listening? Apparently. Because we can watch the neighbours react.

Some plants pump out smelly chemicals to keep insects away. But others do double duty. They pump out perfumes designed to attract different insects who are natural enemies to the attackers. Once they arrive, the tables are turned. The attacker who was lunching now becomes lunch.

In study after study, it appears that these chemical conversations help the neighbors .The damage is usually more serious on the first plant, but the neighbors, relatively speaking, stay safer because they heard the alarm and knew what to do.

Does this mean that plants talk to each other? Scientists don’t know. Maybe the first plant just made a cry of pain or was sending a message to its own branches, and so, in effect, was talking to itself. Perhaps the neighbors just happened to “overhear” the cry. So information was exchanged, but it wasn’t a true, intentional back and forth. Charles Darwin, over 150 years ago, imagined a world far busier, noisier and more intimate (亲密的) than the world we can see and hear. Our senses are weak. There’s a whole lot going on.

1. What does a plant do when it is under attack?

A．It makes noises.	B．It gets help from other plants.
C．It stands quietly	D．It sends out certain chemicals.

2. What does the author mean by “the tables are turned” in paragraph 3?

A．The attackers get attacked.

B．The insects gather under the table.

C．The plants get ready to fight back.

D．The perfumes attract natural enemies.

3. Scientists find from their studies that plants can ________.

A．predict natural disasters

B．protect themselves against insects

C．talk to one another intentionally

D．help their neighbors when necessary

4. What can we infer from the last paragraph?

A．The world is changing faster than ever.

B．People have stronger senses than before

C．The world is more complex than it seems

D．People in Darwin’s time were imaginative.

7 . 阅读下面的短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

Chengdu has dozens of new millionaires, Asia’s biggest building, and fancy new hotels. But for tourists like me, pandas are its top     1    (attract).

So it was a great honour to be invited backstage at the not-for-profit Panda Base, where ticket money helps pay for research. I     2    (allow) to get up close to these cute animals at the 600-acre centre. From tomorrow, I will be their UK ambassador. The title will be     3    (official) given to me at a ceremony in London. But my connection with pandas goes back     4     my days on a TV show in the mid-1980s,     5     I was the first Western TV reporter     6    (permit) to film a special unit caring for pandas rescued from starvation in the wild. My ambassadorial duties will include     7    (introduce) British visitors to the 120-plus pandas at Chengdu and others at a research centre in the misty mountains of Bifengxia.

On my recent visit, I held a lively three-month-old twin that had been rejected by     8    (it) mother. The nursery team switches him every few     9    (day) with his sister so that while one is being bottle-fed,     10     other is with mum—she never suspects.

8 . In my everyday life, I am on an ongoing journey to figure out different ways to reduce my carbon footprint on the planet. A carbon footprint is the measure of influence our activities have on the environment, in particular climate change. It is calculated by the amount of greenhouse gas we produce in our daily lives. Fortunately, nowadays it is much easier to make eco-friendly lifestyle choices than, let's say, 20 years ago. But one question has been on my mind a lot lately: is it better to buy new eco-friendly products or used traditionally produced goods?

After doing some research, I have decided that some things are better new and others are better used. Let me try to explain.

A carbon footprint is made up of two parts, the primary footprint and the secondary footprint. The primary footprint is a measure of our direct emissions(排放)of carbon dioxide(CO2)from the burning of fuels, including household energy consumption and transportation. The secondary footprint is a measure of the indirect CO2 emissions from the whole lifecycle of products we use-those related to their production and breakdown.

Based on this understanding, we have a good deal of control and responsibility over our carbon footprint. Things like dishes, clothes and furniture fall into the “secondary footprint” group, so less is more and we can focus on finding used goods to avoid the added production. However, for the car and the other appliances(设备)that we need we can go with new, energy-saving models. I heard somewhere that electronics and appliances give off 90% of their carbon footprint after they leave the factory. So it seems most reasonable to go for the energy-saving models. The main concern here is the amount of energy that goes into the making of new products and whether or not that extra carbon is worth the footprint the product will make once it gets to you.

1. What is the text mainly about?

A．What appliances to buy to save energy.

B．What a carbon footprint means in our life.

C．How to identify different carbon footprints.

D．How to make eco-friendly lifestyle choices.

2. What do we know about the secondary carbon footprint?

A．It is related to our consumption of fuels.

B．It is made when we are buying the products.

C．It is less harmful than the primary carbon footprint.

D．It is counted as ours though not directly made by us.

3. Which of the following helps reduce our carbon footprint according to the author?

A．Using second-hand textbooks.	B．Using old and expensive cars.
C．Buying new but cheap clothes.	D．Buying new wooden furniture.

4. "The footprint" underlined in the last sentence refers to the CO2 produced in _________.

A．using the product	B．recycling the product
C．making the product	D．transporting the product

9 . Amsterdam is one of the most popular travel destinations in the world, famous for its beautiful canals, top art museums, cycling culture and so on. It is the capital city of the Netherlands and often referred to as the “Venice of the North” because of its expansive system of bridges and canals. Here are some of the key points to remember as you plan your trip to Amsterdam.

Must-See Attractions

Most visitors begin their Amsterdam adventure in the Old Centre, which is full of traditional architecture, shopping centers, and coffee shops. You’ll also want to check out Amsterdam’s Museum Quarter in the South District, which is great for shopping at the Albert Cuyp Market and having a picnic in the Vondelpark. The top museums to visit there are the Rijksmusuem, the Ann Frank House, and the Van Gogh Museum.

If You Have Time

There are several other unique districts in Amsterdam, and you should try to explore as many of them as time allows. The Canal Ring is a UNESCO World Heritage Site that was originally built to attract wealthy home owners and is a center for celebrity spotting and nightlife today. The Plantage area has most of the city’s museums and the botanical gardens.

Money Saving Tips

●Unless you really want to see the tulips(郁金香) blooming, avoid booking between mid-March and mid-May. This is when hotel and flight prices rise.

●Look for accommodations in Amsterdam’s South District, where rates are generally cheaper than in the city center.

●Buy train tickets at the machine instead of the counter to save a bit of money.

●Instead of hiring a tour guide, hop on a canal boat. They’re inexpensive and will give you a unique point of view of the city.

Check out our homepage to view price comparisons for flights, hotels, and rental cars before you book.

1. What can be learned about Amsterdam from this passage?

A．The Van Gogh Museum lies in the South District.

B．The Canal Ring is a place to attract garden lovers.

C．The Old Centre is a UNESCO World Heritage Site.

D．Amsterdam is called the “Venice of the North” because of its location.

2. In order to save money in Amsterdam, you can ________.

A．arrange a guided tour	B．buy train tickets at the counter
C．reserve a hotel in the South District	D．book flights between mid-March and mid-May

3. Where is the passage most probably taken from?

A．A magazine.

B．An essay.

C．A report.

D．A website.