1 . It is always said that China is the homeland of tea, which has a very long history of tea.     1     However, unlike the western custom of using a convenient teabag, Chinese go to a lot of effort and time to prepare good tea for their guests, using tea leaves, natural spring water and a special kettle etc. to create worldwide famous tea culture. Tea is not just a drinkable beverage(饮料), but also a taste of Chinese traditional culture and inheritance(继承) of spirit. Unsurprisingly, there are various tea leaves in China.     2    

➢Color

    3     Good green tea leaves have jade green with fresh vitality. Twisted pan green tea shows glossy gray green. If some of the tea leaves have dry, dark and brown colors, it means it is old tea. If the leaves have mixed, large contrast colors, it is believed that the tea is mixed with yellow leaves, old leaves and even old tea, which does not live up to the standard of good tea.

➢Flavor(味道)

New tea is extremely clear and transparent with strong aroma(芳香), while old tea is characterized by brown color and weak fragrance. Take green tea and black tea for example, new green tea tastes a little bitter first, and then the fresh sweet taste begins to surface gradually, leaving a long and memorable after taste in mouth.     4    

➢Place of origin

There is great gap of quality among various places of origin.     5     For example, it is well-known that Yunnan produces the best quality Pu'er tea and premium Oolong tea can be found within Fujian Province.

A．Every tea leaf has its own shape.

B．Some varieties are identified by tightness of the leaves.

C．It is always advised to select tea from its main producing areas.

D．While you’re selecting tea, you should pay attention to following aspects.

E．For foreigners in China, drinking tea may seem like simple refreshment(提神).

F．Generally, new tea leaves look fresh and pleasing, with light green or dark green.

G．On the contrary, if bitter taste takes the lead and fresh sweet taste subsides(减弱), it is black tea.

3 . 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。

In most Chinese tea villages, March is the time of year when locals start to pick and process tea. The     1     (usual) quiet villages suddenly become busy centers of activity, as people take out special tools and prepare     2     tea processing. In some villages, local people hold traditional ceremonies,     3     (thank) heaven for its blessing. The price of tea     4     (pick) in March is extremely high because it is fresh and contains multiple trace elements. China     5     (be) famous for tea production since ancient times. Of the goods transported and traded along     6     Old Silk Road linking China to the Middle East and Europe, the importance of tea     7     (match) only by silk. China produces Oolong, black, green, white, yellow and dark―also known as post-fermented (发酵). The Oolong, green and black     8    (vary)are most notable for their high quality. Most of China’s tea villages are found in remote    9     (mountain) areas in the south and southwest of the country,     10     the beautiful scenery is often hidden under clouds.

5 . Find Your Chicago Architecture Tour

Chicago is known around the world for its architecture. Whether you tour downtown or a neighborhood, our guides will tell you the stories behind the buildings.

Must-see Chicago

Must-see Chicago is a fast-paced, 90-minute tour to Chicago featuring(以…为特色) some of its most famous buildings, including the Wrigley Building, Tribune Tower and more! Get a brief overview of more than a dozen buildings—as well as Chicago landmarks like Millennium Park, the Loop and the Chicago River.

Duration: 1.5 hours

Price: $ 26 public, free for CAC members

Architecture Highlights

Discover the exciting diversity(多样性) of Chicago architecture, which traces the city’s development from its founding through present day. We cover about 30 miles of Chicago design, passing through the Loop and the Gold Coast, as well as Hyde Park and other areas of the South Side. We’ll see two university campuses and several parks.

Duration: 3.5 hours

Price: $ 55 public, free for CAC members

Historic Treasures of Chicago’s Golden Age

Learn about the great architectural landmarks of Michigan Avenue and State Street, with views inside beautiful buildings from the 1890s〜1930s. The most memorable parts include the amazing interiors(内部) of the Palmer House Hotel and the Chicago Cultural Center.

Duration: 2 hours

Price: $ 26 public, free for CAC members

Elevated Architecture: Downtown “L” Train

Explore Chicago’s amazing architecture from the unique view of elevated trains and station platforms. Learn the history behind the famous “L” system and hear how it has shaped the development of buildings within the Loop. The city’s first elevated train started making trips in 1892. Now considered one of Chicago’s most wonderful features, the “L” offers impressive views of downtown.

Duration: 2 hours

Price: $ 26 public, free for CAC members

1. Which tour can you choose if you want to see Millennium Park?

A．Must-see Chicago.

B．Historic Treasures of Chicago’s Golden Age

C．Architecture Highlights.

D．Elevated Architecture： Downtown “L” Train.

2. When visiting Architecture Highlights, a couple should pay ______.

A．$55

B．$ 110

C．$ 165

D．$ 220

3. What can you see on the third tour?

A．The Chicago River.	B．The Gold Coast.
C．The elevated trains.	D．The Palmer House Hotel.

6 . 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.

7 . The Great Wall, China

Stretching over 21,000 kilometers, the Great Wall was built to prevent invasions and has a history of more than 2,000 years. UNESCO in February 2019 calls it an absolute masterpiece, not only because of the ambitious character of the undertaking but also the perfection of its construction.”

But perfection isn’t protection. 51.2 percent of the Great Wall had either already disappeared or is at a significant risk of disappearing. Besides for wind and rain erosion, the main reasons for the destruction of the Great Wall are human factors such as tourism, construction, human contact and so on.

Pamukkale，Turkey

Pamukkale, which means “cotton castle” in Turkish, is famous for its shining white calcite terraces (方解石阶地)with warm and mineral-rich waters overrun.

Before being listed as a World Heritage Site in 1988, Pamukkale had been severely damaged by human activities. People used hot spring water to fill swimming pools, some visitors stood on the rocks and some even bathed in the hot springs with soap and shampoo. To protect the terraces, the Turkish government has decided to pull down the hotels and require all tourists to visit this site barefoot.

Great Barrier Reef, Australia

Home to 400 types of coral and 1,500 species of fish, the Great Barrier Reef draws visitors to Australia from all over the world.

However, the Great Barrier Reef is expected to suffer from increasingly frequent bleaching events, cases in which corals turn white and may die, according to a UNESCO report. The heat waves caused by global warming have killed half of the coral here in the two years, according to a CNN report. Pollution from industry developments and harmful fishing practices are also big concerns.

The Dead Sea, Jordan

At 423 meters below sea level, the Dead Sea is 10 times saltier than the ocean, meaning that the water is so dense, even tourists who can9t swim will be able to float.

But the seaside resorts built in the 1980s now sit kilometers away from the water’s edge, which has lost half of its surface area in the past 40 years. The damage is irreversible due to the nature of the mineral industry and the type of agricultural use that has drained the water.

1. Which are you required to visit without shoes?

A．The Great Wall, China.

B．Pamukkale, Turkey.

C．Great Barrier Reef, Australia.

D．The Dead Sea, Jordan.

2. Which of the following statements is true?

A．Main reasons for the destruction of the Great Wall come from wind and rain erosion.

B．Pamukkale was damaged by human activities after 1988.

C．Pollution and the heat waves caused by global warming kill much coral in the Great Barrier Reef.

D．Half of the Dead Sea surface area has disappeared in the past two decades.

3. What do the above spots have in common?

A．They are all famous endangered natural spots.

B．They’re damaged only from human activities.

C．They all draw the attention of the governments.

D．They’re all seriously damaged.