The extinction of the Chinese paddle-fish (白鲟) and wild Yangtze sturgeon (野生长江鲟鱼),     1     (announce) by the international Union for Conservation of Nature (IUCN), started a wave of comments on china’s social media recently, demanding more environmental     2     (protect).

The IUCN’s latest list of threatened species showed that 100% of the world’s remaining 26 sturgeon species are now at risk of extinction, up from 85% in 2009. “The assessment, based on new calculations, shows their decline over the past three generations is     3     (sharp) than previously thought,” the organization said,     4     (add) that the reassessment had also confirmed the extinction of the Chinese paddle-fish. Both the Chinese paddle-fish and the Yangtze sturgeon were common species in the Yangtze river basin,     5     have been troubled by heavy shipping. traffic, overfishing and water pollution.

The Chinese paddle-fish was one of     6     biggest freshwater fish species in the world and could grow up to 7 meters in length. The IUCN ranked it among “    7     (critical) endangered” for the first time in 1996     8     (warn) people of the possibility of its extinction. The Yangtze sturgeon could grow up to 8 meters. Its meat was considered delicious in China.     9     a source of caviar (鱼子酱), it     10     (catch) in great numbers and was purchased at a high price.

With the     1     (develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because     2     air pollution.

Air pollution is caused by the following     3     (factor): about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off     4     (poison) gases. 25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health     5     to others.     6     these, about 10% of air pollution is caused by other reasons. We should take some measures to fight     7     pollution. New fuel can be used to take     8     place of gas. We can plant more trees. If everybody realizes the     9     (important) of environment and does something to stop pollution, the problem will     10     (solve).

Earth Day is an event    1    (annual) celebrated on April 22.     2    (found) by Senator Gaylord Nelson, an American politician and environmentalist, it was originally aimed at helping the public to know the current situation of air and water pollution and    3     (get) people to care about the earth.

In1962, Rachel Carson’s bestselling book “Silent Spring” created an    4    (aware) of the dangerous effects of pesticides (农药) . Then, a fire,     5     broke out in 1969 on Cleveland’s Guyahoga River, shed light on the problem of chemical pollution in water. Senator Gaylord Nelson dreamed of    6    similar large event that would get people to take environmental issues seriously. In 1969, he was inspired by protests against the Vietnam War and came up with the idea for Earth Day.

In the fall of 1969, Nelson announced it and appealed to the entire country to get involved. Consequently, telegrams, letters and telephone calls    7    all over the country poured in. Since 1970, Earth Day celebration have grown. Later, Nelson    8    (award) the Presidential Medal of Freedom in recognition of his work.

Today, Earth Day is celebrated around the world every April 22. Sometimes numerous communities celebrate Earth Week, an entire week of    9    (activity) focused on the Environmental issues. In 2017, the March for Science    10    (occur) on Earth Day(April 22, 2017) and was followed by the People’s Climate Mobilization (April 29, 2017).

A small town in England is teaching the world that it is important     1     (grow) your own food. Any open space     2     (use) to grow fruit and vegetables. There are apples, pears, peaches, strawberries, cabbages and carrots, here and there. Everyone can pick them     3     free. Eight years ago, a woman named Pam in Todmorden dug up her rose garden. She planted vegetables, knocked down the garden walls and put up a sign     4     (say), “Help yourself.” Today, Pam has     5     (complete) changed the town. A new town has been born,     6     is called “Incredible Edible Todmorden”. Pam explained why she thought the idea was popular. “It’s possible and positive. Many people know we have to change,     7     how we do that is a question.” So one day, gathered all the     8     (villager) together. They decided to do something different at once. They didn’t write reports. They didn’t ask for permission. They just did it. Only a short time later, Todmorden     9     (become) a big garden of fruit and vegetables. In Todmorden, there is a motto: If you eat, you are in. But that’s not all. There are     10     (many) than 700 edible towns popping up around the world, from Canada to Mali. People there think about food and protect the environment at the same time.

Melati and Isabel deeply love their home on the island, which    1    (surround) by rain forests, green fields, and a vast ocean. Enjoying a swim at their local beach was once a daily pleasure for them. But when Melati was fifteen, and Isabel just ten, the sisters started to lose their     2    (interesting) in swimming in the waters near their home. Plastic bags would be around them as they swam and some were scattered (散落) on the beach. They got     3     (extreme) upset about that.

Melati didn’t think much about it until one day her teacher gave a lesson on some world heroes,     4     had sparked (引发) movements of positive changes in the world. After school, Melati walked home slowly in silence,     5    (concern) about the large amount of plastic rubbish on the beach. The heroes crossed her mind. Then    6     idea lit her up. She couldn’t wait to share what she thought with Isabel. Isabel also had a strong desire to do something. Picturing a    7    (fascinate) beach as before in mind, the pair jumped with joy.

They made a list     8     things they needed and reached out to the community for support. Melati and Isabel’s small idea attracted many volunteers to help clean up the beach,     9    (make) it start to become cleaner and more beautiful again. The sisters were overjoyed to see the impact they had made and continued to inspire others to take action against plastic pollution. They knew that even small actions like theirs could create significant positive change in     10    (they) community and the world.

Without the usual smoggy days, local     1    (resident) have been happy with the air quality since the heating season started. They open the window to air their homes. On social media, pictures of blue skies and white clouds     2     (frequent) appear,     3    (show) people’s excitement about the clear days.

In Shanxi,     4     major coal production province, burning coarse coal (粗煤) for heating used to be a main source of air     5    (pollute). The government has been striving to change all this. It has launched a campaign to replace coarse coal     6     clean fuels for heating since 2017.

More than 38 percent of the heating companies in Shanxi had applied advanced equipment with higher efficiency and     7    (low) emission (排放) by the end of 2019,     8    (compare) with 25.5 percent at the end of 2017. It     9     (believe) that the number can reach 50 percent by the end of this year,     10     is the goal of the government.

The earth’s plants     1     animals become endangered every day. And many of them are     2     (die) out. If nothing is done, we may find     3     (our) alone on the earth.

Wild animals live in the forests     4     are being destroyed by people. As a result, the animals are losing their habitats. Besides, animals are short of food because of     5     (pollute). Even     6     (bad), buying leads to killing, too.

I suggest that measures should be taken     7     (protect) wildlife. First, we can try to raise people’s awareness to love animals, for they are our     8     (friend). Then the government should make laws, if someone hunt, they must     9     (punish). If we do so, I am sure humans can live in harmony     10     animals.