Question 9 is based on the passage you have just heard.

听力原文

    Birds are famous for carrying things around. Some, like homing pigeons, can be trained to deliver messages and packages. Other birds unknowingly carry seeds that cling to them for the ride. Canadian scientists have found a worrisome new example of the power that birds have to spread stuff around. Way up north in the Canadian Arctic, seabirds are picking up dangerous chemicals in the ocean and delivering them to ponds near where the birds live. Some 10,000 pairs of the birds, called fulmars, a kind of Arctic seabird, make their nests on Devon Island, north of the Arctic Circle.

    The fulmars travel some 400 kilometers over the sea to find food. When they return home, their droppings end up all around their nesting sites, including in nearby ponds.

    Previously, scientists noticed pollutants arriving in the Arctic with the wind. Salmon also carry dangerous chemicals as the fish migrate between rivers and the sea. The bodies of fish and other meat-eaters can build up high levels of the chemicals. To test the polluting power of fulmars, researchers collected samples of deposit from 11 ponds on Devon Island. In ponds closest to the colony, the results showed there were far more pollutants than in ponds less affected by the birds. The pollutants in the ponds appear to come from fish that fulmars eat when they’re out on the ocean. People who live, hunt, or fish near bird colonies need to be careful, the researchers say. The birds don’t mean to cause harm, but the chemicals they carry can cause major problems.

9. What have the Canadian scientists found about some sea birds？

解析：B。本题目为细节题。问题为：关于海鸟，加拿大的科学家发现了什么？原文所在句：Canadian scientists have found a worrisome… Way up north in the Canadian Arctic, seabirds are picking up dangerous chemicals in the ocean and delivering them to ponds near where the birds live.加拿大科学家发现了一些令人担忧的情况，北上加拿大北极地区的海鸟，会携带危险的海洋里的化学物质，并且将这些危险物质带到它们所居住的池塘。选项B) They deliver pollutants from the ocean to their nesting sites与文中信息相一致。选项与原文的关键词替换处为nesting sites与where the birds live，二者均表示鸟的栖息地。