The novel coronavirus pneumonia(新型冠状病毒肺炎）outbreak in China was caused by a new coronavirus that we have never seen before.     1     was first found in the Huanan Seafood Market in Wuhan,     2     a variety of wild animals were on sale.People who sold and bought animals     3    （illegal)were the first to be infected(感染）。Scientists have found that the virus probably     4    (come)from bats and then was spread to humans from pangolins(穿山甲）。Bats can carry and spread more than 60 viruses,and other wild animals like snakes are also     5    (host)of many viruses.

There have been calls for people     6    (stop)eating wild animals.However,the danger also lies     7     touching them.Although     8    (carry)many diseases,the wild animals shouldn't be regarded as evil.Each variety of animal     9    （have)a role in the ecosystem and all of them are important for keeping     10    good ecological balance.

Da Mao and Er Shun, two pandas which     1     (send) to Calgary Zoo in Canada in 2014, are being sent back to China two years ahead     2     schedule. Two cubs born to them will also be sent back.

The animals feed on fresh bamboo, which is     3     (especial) flown in for them from China. But with the novel coronavirus outbreak affecting flights, fresh supplies have been delayed so far. According to the zoo staff,     4     pandas are fussy eaters and will refuse bamboo that has spent a lot of time in transport. They have tried to find a new bamboo supplier to feed     5     (they), but met many problems. “We believe the     6     (safe) place for Er Shun and Da Mao now is China in     7     bamboo is rich and easy to access,” Calgary Zoo President and CEO Clement Lanthier said.

People all say that Da Mao and Er Shun are fortunate enough     8     (have) a hometown to return to when faced with     9    (difficulty) because China controlled the novel coronavirus outbreak successfully so that it can consider     10     (get) the pandas back and provide them with fresh bamboos.

More than 11,000 scientists are warning that the Earth, in their words, “clearly faces a climate emergency.” The scientists represent several fields of study and come from 150     1     (country) around the world. They approved a report that appeared in the publication Bioscience     2     (early) this month. It warns that the world would face “untold human suffering”     3     it does not make deep and lasting shifts in human activities that influence climate change.

The new report     4     (call) the “World Scientists’ Warning of a Climate Emergency.” This is the first time     5     large group of scientists have jointly(共同地) used the word “emergency” when     6     (talk) about climate change. “Despite 40 years of global climate negotiations...we have generally conducted business as usual and have largely failed     7     (address) this predicament(艰难处境),” the study said. “Climate change has arrived and is accelerating faster than many scientists expected.” The report identified six areas that the world needs to deal     8     immediately. The scientists appealed to nations to use energy more efficiently and cut     9     (they) use of fossil fuels. They suggested that lawmakers approve taxes on the burning of carbon-based fuels, such as coal, oil and     10     (nature) gas.

High on the Qinghai-Tibet Plateau     1    (lie) China’s “water tower” Sanjiangyuan. It is home to the headwaters of China’s three rivers: the Yellow River, Yangtze River, and Lancang(Mekong) River. It is the three rivers     2     provide water for about half the population of China. However, human activities are putting this ecosystem     3     risk. Hopefully, though, we can repair this damage. In 2016, the Chinese government established Sanjiangyuan National Park in Qinghai province. The park,     4    (schedule) to open in 2020, has increased the area’s green coverage and attracted more wildlife. The local government has also made great effort to improve biological diversity. The success of Sanjiangyuan will mark the start of a     5    (green) future. With Sanjangyuan     6    (take) the lead, nine other regions in China     7    (choose) by a field conservation station to carry out projects over the past three years,     8     will form a national park system together. The idea of a national park system is still new in China, but    9    (it) realization is urgent. After all, building an ecological civilization bears great       10    (important) in the development and progress of human civilization.

As the effects of global warming, rising sea levels and natural disasters become     1    (serious) than before, some local communities are taking action. Among them is one community in Florida     2     local people and government officials are proving successful in protecting coastal cities from the dangers of rising sea levels.

The community has studied how much sea levels will rise and has suggested addressing the problem in some     3    (effect) ways. It has persuaded the state government     4    (ban) new developments on land near the coastline and recommended     5    (build) sand dunes(沙丘) along beaches. Kristin Jacobs, one of the group's founders, decided to take action in 2008 after it became     6    (gradual) clear that her state's 27 water authorities couldn't agree on joint action.

While some Florida government officials doubt     7     the climate will become hotter or colder, the people living in these     8    (locate) are certain of the need to protect their communities.

At present, coming     9     with ways to fight against the effects of climate change under a limited budget     10    (be) a pressing concern. Only time will tell whether these communities will succeed in the end.