1 . 听下面一段独白，回答以下小题。
1. What is wrong with the lake?

A．Its color is strange.

B．There are not enough fish there.

C．Chemical pollution happened there.

2. What probably caused the trouble?

A．People’s action.

B．Fish.

C．The weather.

3. What will listeners probably hear next?

A．Sports news.

B．Updated information on the lake.

C．The weather report.

4. What does the report mainly talk about?

A．Warnings to children.

B．The color change of the lake.

C．The pollution of the lake.

2 . 阅读下面短文，在空白处填入适当的内容或括号内单词的正确形式。

2017 witnessed the 45th anniversary of the     1    (establish) of Sino-German diplomatic relations. Many     2    (activity) with Chinese culture as the theme were held in Berlin, the capital of Germany. When     3    (walk) in Berlin, people can really feel that this city deserves its title as the largest city in Germany. The history of Berlin could     4    (trace) back to over 800 years ago. In 18th century, Berlin became the capital of the Kingdom of Prussia. In 1871, after Otto Von Bismarck, Minister President of Prussia, unified the German States. In modern times, Berlin became the city with the greatest vitality in Germany because     5     its emerging buildings and dynamic culture.

In the very center is the famous BrandenBurg Gate, the construction of     6     started in 1789 and was completed in 1791. This BrandenBurg Gate has became a symbol of Germany. If people take     7     look at the modern Germany history, they can find that this gate was     8    (repeat) involved at critical moments.

After World WarII, the Berlin Wall stood in front of the Brandenburg Gate, and remained a symbol of separation for as     9    (long) as 28 years. After the German reunification, this area around the gate was finally restored according to     10    (it) original design.

3 . The World’s Most Amazing Caves

Humans have been drawn to caves for thousands of years. Here are four of the world’s biggest caves.

Son Doong Cave, Vietnam

Son Doong Cave in the remote(偏远的)forests of Vietnam holds the title of the largest cave in the world. Son Doong is a spreading network of tunnels and caves, the largest of which could contain an entire New York City block with 40-story buildings. Parts of the cave’s top have fallen down，creating vast skylights that allow life to grow to a height of hundreds of feet beneath the forest floor.

Mammoth Cave, Kentucky, the United States

Mammoth Cave in Kentucky is the longest cave system in the world, with 426 miles explored—and scientists guess another 600 miles have yet to be discovered based on measurements of air movement within the caves. Mammoth Cave has drawn visitors since the 1800s, and 10 miles of underground passages are accessible to tourists today.

Sac Actun. Mexico

The longest underwater cave system in the world, Sac Actun winds(蜿蜒)more than 215 miles under Mexico’s Yucatan Peninsula. Adventurers can take a drop in the Sac Actun system through more than 248 cenotes(天然井)—the natural swimming pools that form when sinkholes connect the surface to the underwater caves.

Veryovkina Cave, Abkhazia, Georgia

Veryovkina Cave is the deepest cave in the world, spreading 1.4 miles beneath the surface. It takes professionals a week to make a round journey to Veryovkina Cave, They have to brave waterfalls, tight presses and sharp drops. But the payoff is excellent—Veryovkina

Cave’s end is a beautiful blue lake about 50 feet long and 25 feet wide surrounded by black black rocks.

1. What is special about Son Doong Cave?

A．It lies far away from the forests.	B．It has some tall plants growing.
C．It is the longest cave in Vietnam.	D．It is the highest cave in the world.

2. What do Mammoth Cave and Sac Actun have in common?

A．They end up with beautiful lakes.	B．They attract few adventurers.
C．They stay unexplored at present.	D．They have long cave systems.

3. How long may professionals spend passing through Veryovkina Cave?

A．Half a week.	B．Two weeks.
C．One week.	D．Over two weeks.

4 . 阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

In Sarek National Park, I wake up to the sound of the wind    1    (buffet) the cloth of my tent. Standing at the edge of the mountain, I find    2    (branch) of the Rapa River flowing through the valley below. Sarek’s mountains used to     3    (cover) by vast sheets of ice. Around 9,000 years ago, this ice melted, with about 100 glaciers     4     (leave) behind. Soon after, reindeer began to arrive. Following the reindeer     5     (be) the Sami people, who made this territory their home. In 1909,    6    (keep)the land’s natural state, the government made Sarek a national park.

For hundreds of years, the Sami lived     7     reindeer. With reindeer on the move, the Sami would pick up their tents and accompany them. Today, most Sami have houses in villages near Sarek and live     8    modern life. But every spring, a small number of Sami still follow their reindeer into the valleys of Sarek,    9     they live in tents and enjoy their traditions. Nothing could be     10     (good) than breathing the fresh air and enjoying this great adventure in such a beautiful and wild place.

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。

Grand Canal, also called Da Yunhe, is a series of waterways in eastern and northern China that connect Hangzhou in Zhejiang Province with Beijing. Some 1, 800 km in     1     (long), it is the world’s longest man-made waterway. Strictly     2     (speak), not all of it is a canal, though. It was built to enable successive Chinese regimes(政权)     3     (transport)grain from the agriculturally rich Yangtze River and Huai River valleys to feed the capital cities     4     large standing armies in northern China.

The oldest part of the canal lies     5     the Yangtze and the city of Huaiyin in Jiangsu Province, which was     6     (origin)on the Yellow River when that river followed a course much     7     (far) to the south. This section, traditionally known as the Shanyang Canal, in recent centuries     8     (call) the Southern Grand Canal. This ancient waterway was first constructed as early as the 4th century BCE.

It was rebuilt in 607 CE. and has been used ever since.

China’s first great canal system,     9     created a northeast-southwest link from the Yellow River to the Huai River, was built beginning in 605 during the Sui Dynasty(581-618). Known as the New Bian Canal, it     10     (remain)the chief waterway throughout the Tang Dynasty(618-907)and the Northern Song Dynasty(960- 1127).