It's usually sad to hear something is ―downgraded(降级). But when the International Union for Conservation of Nature(IUCN,国际自然保护联盟)downgraded the giant panda on its Red List in 2016,the whole world was h______. The Red List r______ the world's species(物种)and points out which ones are going to extinct(灭绝). Since the 1990s,the giant panda has been in danger. Now its status(危险等级)has been lowered to ―vulnerable(脆弱的). Researchers believe there are now nearly 2,000 giant pandas l______ in the wilds of China. The n______ was 1,600 in 2003 and 1,200 in the 1980s.

The increase in the panda population is great because China does the best to s______ the cute animals. Since 1958, China has b______ 67 nature reserves for pandas. There they are safe from danger and enjoy enough fresh b______.

China has also welcomed other foreign organizations that wish to study pandas. The first such visit was in 1979 by the World Wildlife Fund (WWF,世界自然基金会). Its world-famous logo made the animal p ______ all over the world. China also sends pandas to other c______ as special ambassadors(大使). Foreign zoos p_______ money and the money can help China to protect pandas better.

The recovery of the panda shows that when science, politics and local communities come together, we can save wildlife, WWF Director General Marco Lambertini told CNN.

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10.______

Air pollution comes from factories, power stations and cars.Chemicals in the smoke from power stations cause a lot of damage(损害;毁坏) They can travel hundreds of miles in the wind before falling to the ground in the rain.And this "chemical rain" gradually destroys trees in the forests and kills fish in the lakes.In Germany, over 50% of the country's trees had been damaged by the year 1986.

Time and time again there are serious accidents that pollute the air.In 1986 there was a serious accident at a nuclear power station in Russia.A cloud of radiation flew across the whole Europe.It is said that 125, 000 people died in Russia as a result of illness caused by this accident.

In 1984 there was a serious accident at a factory in India and a cloud of dangerous gas covered the town of Bhopal.Over 2, 500- people were killed that night, and hundreds of thousands of people were injured(受伤的). Many of the injured lost their sight.

1.Air pollution comes from__________.

A.factories B.power stations C.cars D.all of the above

2.According to the passage, which sentence is right?

A.“Chemical rain” is good for the trees.

B.Chemicals in the smoke from power stations are very safe.

C.“Chemical rain” is bad for our environment.

D.Chemicals in the smoke from power stations can't travel far in the wind.

3.In Germany, how many trees had been damaged by the year 1986?

A.a quarter B.A half C.Three quarters. D.A third.

4.From the sentence “Many of the injured lost their sight.”we can know__________.

A.the gas covered the town of Bhopal at that -time was poisonous(有毒的)

B.gradually the injured could see everything

C.many of the injured couldn't see anything any more

D.Both A and C

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