题目内容：

Plastic waste has polluted the Arctic. Two new studies have spied bags, fishing rope and tinier bits of rubbish in the Barents Sea. This sea sits north of Norway, Sweden, Finland and Russia. It mixes with the Arctic Ocean, which is even farther north.

Plastic waste in the Arctic could harm wildlife and may hint that large volumes of human rubbish are collecting there, says Melanie Bergmann. She is one of the scientists who spotted the waste. She studies Earth’s oceans at the Alfred Wegener Institute in Bremerhaven, Germany. She first started counting bits of plastics in the Barents Sea because she kept spotting signs of the stuff there in images taken with deep-sea cameras.

Bergmann and her colleagues counted pieces of plastic from an icebreaker, a boat designed to break through large blocks of ice in very cold waters. They also tracked plastic pieces they saw during helicopter rides over Arctic waters. The team found 31 pieces of plastic. “That doesn’t seem like much, but it shows us that we’ve really got a problem, one that extends even to this remote area, far from civilization,” Bergmann says. She and her colleagues described their findings October 21 in Polar Biology.

Another team has also been counting plastics in the area. Those scientists took water from the Barents Sea and counted the number of smaller bits of plastics, called microplastics.

Plastic in the ocean is dangerous to animals. Some may get caught in rope or bags. And wildlife may swallow bags and other plastic bits. That makes them feel full. But some may eventually starve because they are not getting the nutrients they need to live. Sometimes plastics also may break down in an animal’s body and release poisonous chemicals. If another animal later eats the one that swallowed plastic, it too can end up with poisonous chemicals in its body. This, in turn, can travel up the food web, endangering predators (肉食动物) — even people.

1.What can be learned from Para 1?

A. Europe is surrounded by the Arctic Ocean.

B. The Barents Sea is to the north of the Arctic.

C. The Arctic Ocean is polluted by plastic rubbish.

D. European countries are to blame for the pollution.

2.What has brought Bergmann’s attention to plastic waste in Barents Sea?

A. Human rubbish dumped in the sea.

B. Pictures taken by deep-sea cameras.

C. Sea water taken to the laboratory.

D. Wildlife spotted by helicopter.

3.What concerned Bergmann according to Para 3?

A. Plastic is found in the remote sea.

B. The sea is covered with plastic.

C. Advanced tools are in great need.

D. People suffered from bad weather.

4.Why is plastic dangerous to animals?

A. Animals may get choked by bags or plastic bits.

B. Animals may die of hunger if they swallow bags.

C. Plastic can release harmful gases to kill animals.

D. It is hard for plastic bags and bits to break down.