On April 22nd, the UNEP(United Nation Environment Programme) called for increasing protection of Antarctica,     1    is the world’s most southern continent.     2    (scientist) say climate change and human activity have     3    (increasing) led to the melting of massive pieces of Antarctic ice. Not only is the disappearance of ice affecting wildlife     4    the area such as seals and penguins, but also causing oceans and seas around the globe     5    (rise).

This leads to an even     6    (big) threat to coastal cities. For instance, Venice, an ancient city of Italy, has long been threatened by the rising sea levels. So far, this situation     7    (make) worse by the fact that its ancient houses     8    (build) on a body of water are slowly sinking. In addition, the salty water is also destroying both famous buildings     9    priceless artworks of Venice. Therefore, it’s high time that action should be taken to fix     10    serious problem.

A cave painting on a small Indonesian island appears to be the earliest     1     (know) record of storytelling through pictures. A team of Indonesian and Australian researchers say the work     2     (date) back nearly 44,000 years. That is several thousand years     3     (old) than European examples of cave art that appear to tell a story.

The painting was seen in a stone cave on the island of Sulawesi in 2017. It shows eight human-like beings     4     (hunt) six animals. Among the animals are native species such as wild horses and pigs. The Indonesian cave painting also provides some of the earliest evidence of human spirituality, said Adam Brumm. He is an archaeologist at Australia's Griffith University,

The Griffith researchers said cave art on Sulawesi was first discovered in the 1950s. At least 242 caves and shelters containing such images     6     (find) in the years since. The island was once named     7     Celebes Island. Some of the caves have seen damaged. This could     8     (threat) the art, said Oktaviana,     9     Indonesian expert on rock art. He added that, ''It would be a tragedy     10     these exceptional old artworks should disappear in our own lifetime, but it is happening. ''

China’s Liangzhu Archaeological Site     1    (declare) on the list of World Heritage sites on Saturday by UNESCO’s World Heritage Committee during its 43^rd session in Baku, the capital of Azerbaijan.

The site,     2    is located in Yuhang District in Hangzhou City in China’s eastern Zhejiang Province, showcases the civilization of prehistoric rice agriculture between 3,300 B.C.     3     2,300 B.C. The ruins of ancient Liangzhu city were discovered in 2007, and then large dam sites     4    (surround) the Liangzhu ancient city were unearthed continuously after 2009. It was     5     (official) submitted to UNESCO in 2019, hoping to win     6     (recognize) as a World Cultural Heritage Site. The site     7     (include) archaeological remains and unearthed cultural relics of the Liangzhu Ancient City as well as a wetland that covers     8     area of 908. 89 hectares in a plain river network. It is also found that the Liangzhu ancestors started to use characters about 5 ,000 years ago, 1 ,000 years     9     (early) than previously thought, according to Colin Renfrew, a retired professor of archaeology at the University of Cambridge.

The World Heritage Committee added Liangzhu to the UNESCO list    10     (encourage) better protection of the site, considered to be of “outstanding universal value” to humanity.

Longjing tea,     1     has topped the list of the ten most famous teas in China with its color, taste and shape,    2     (name) after its region of production — Longjing Village of West Lake. The good environment and water resources are good for the     3     (grow) of the tea, confirming (证实) the saying that “Longjing tea is the    4     (good) among all of the teas in the world”.

Thanks     5     Emperor Qianlong of the Qing Dynasty, the tea has earned a high reputation. It is said that Emperor Qianlong visited a mountain of Longjing Village of West Lake on his travels in Hangzhou, and he saw some ladies picking the tea at     6     foot of the mountain. He was so interested in their movements that he decided to have a go himself.

While     7     (pick) the tea, he received the news of his mother’s illness, so he carelessly put the leaves in his pocket and     8     (leave) Hangzhou for Beijing. He visited his mother     9     (immediate) upon his arrival in Beijing, and his mother smelt the pleasant smell of the tea leaves from his pocket and wanted to have a taste. After drinking a cup of tea, she found herself completely     10     (energy), and she even praised it as a cure for all illnesses.

Strange things appeared before the Tangshan earthquake happened. For three days the water in the village wells     1    (rise) and fell. The well walls had deep cracks in them. A smelly gas came out of the cracks. Some animals including fish,     2    (mouse) behaved strangely. Other strange things also happened in the city,     3     people thought little of these events and they slept as usual.

    4     (final) a terrible earthquake hit the city of Tangshan on July 28, 1976, in which more than 240,000 people died and many     5    (injure). Many houses fell down and sand filled the wells instead of water. People were greatly shocked. All the electricity in the city was cut off and people began     6     (wonder) how long the disaster would last. The whole city was completely destroyed and the world seemed to be     7    an end. It was one of the most destructive earthquakes ever,     8     shocked the whole nation.

However, the people of Tangshan didn’t lose hope because 150,000 soldiers were sent to help the rescue workers. The soldiers tried their best to dig out those     9     were trapped. They also built shelters for the     10     (survive). Fresh water was taken to the city by every means. Slowly, the city began to come back to life.

Dogs are often called “man’s best friend” and make ideal pets.

    1     most attractive quality of a dog is its faith in its owner. They always greet us when we come home and they will never leave us even     2       a desperate (绝望的) situation. For example, there was a very sick man and his dog barked and barked until the rescue team     3     (arrive).

Furthermore, dogs are strong animals     4     will protect us. Houses with dogs are considered much     5     (safe) than those with burglar alarms (防盗警报器). Not only will they stop thieves,     6     they will also guard against fire. For example, there was a serious fire and a dog managed     7       (pull) its owner out.

And     8     (final), dogs can be trained by people. Dogs can do a number of things that people can not. For example, they can find drugs, bodies, illegal DVDs and hunt down prisoners   with     9     (they) nose. They’re also used to help the elderly and disabled.

To sum up, dogs are really friendly, civilized (文明的) and loyal     10     (partner).

Lions，tigers and other animals are staying awake at night    1    （avoid）human beings，a new study finds．

Scientists have known that human activities can lead to changes in nature．Many animals may move around less or travel to far places to keep away    2    people．By being awake at night，animals can also be on guard against possible enemies and spend less time    3    （look）for food．

The latest research found even activities like farming and camping can    4    （fright）animals and cause them to become more active at night．    5    had been studied were lions in Tanzania，tigers in Nepal and monkeys in Brazil．Researchers compared    6    （careful）how much time those animals were active at night in areas of human activities，such as hunting and farming．    7    was human activities that caused an increase of about 20 percent in night time activities，even in creatures that usually sleep at night．Results    8    （publish）in the journal Science two months ago．

The new findings are    9    （usual）because no one else has looked at it in such detail before Ecologist Marlee Tucker was    10    （surprise）that any kind of human activities is enough for animals to see people as a threat．

8 . California is the third     1    (large) state and the most multicultural state in the US. This is not     2    (amaze) when you know the history of California,     3    has attracted people from nearly every country in the world. No one really     4    (know) when the first settlers arrived in    5     we now call as California. Historians believe that Native Americans reached California     6    means of a land bridge. In the 18^th century, California was ruled by Spain. Of the first Spanish to go to California, the majority were religious men. In 1848, due to the     7    (discover) of gold in California, the dream of becoming rich quickly attracted people from all over the world. In fact, few achieved their dream of becoming rich, but most remained in California to make     8    life for themselves. In more recent decades, California     9    (become) home to more people from Asia.     10     is believed that before long the integration of nationalities will be so great that there will be no distinct major racial or cultural groups.

9 . Are you facing a situation that looks impossible to fix?

In 1969,the pollution was terrible along the Cuyahoga River Cleveland, Ohio. It    1    (be) unimaginable that it could ever be cleaned up. The river was so polluted that it    2    (actual) caught fire and burned. Now, years later, this river is one of    3    most outstanding（杰出的）examples of environmental cleanup.

But the river wasn’t changed in a few days    4    even a few months. It took years of work     5    (reduce) the industrial pollution and clean the water. Finally, that hard work paid off and now the water in the river is    6    (clean) than ever.

Maybe you are facing an impossible situation. Maybe you have a habit    7    is driving your family crazy. Possibly you drink too much or don’t know how to control your credit card use. When you face such an impossible situation, don’t you want a quick fix and something to change immediately?

While there are    8    (amaze) stories of instant transformation, for most of us the    9    (change) are gradual and require a lot of effort and work, like cleaning up a polluted river. Just be     10    (patience).