Question 10 is based on the passage you have just heard.

Passage One

听力原文

     While some scientists explore the surface of Antarctica, others are learning more about a giant body of water four kilometers beneath the ice pack. (9) [Scientists first discovered Lake Vostok in the 1970s by using radio waves that penetrate the ice.] Since then, they have used sound waves and even satellites to map this massive body of water.

    How does the water in Lake Vostok remain liquid beneath an ice sheet? “The thick glacier above acts like an insulating blanket and keeps the water from freezing,” says Martin Siegert, a glaciologist from the University of Wales. In addition, geothermal heat from deep within the earth may warm the hidden lake. (10) [The scientists suspect that micro-organisms may be living in Lake Vostok, closed off from the outside world for more than 2 million years.] “Anything found there will be totally alien to what’s on the surface of the earth,” says Siegert. 

    Scientists are trying to find a way to drill into the ice and draw water samples without causing contamination. Again, robots might be the solution. If all goes as planned, a drill-shaped robot will melt through the surface ice. When it reaches the lake, it will release another robot that can swim in the lake, take pictures, and look for signs of life. (11) [The scientists hope their discoveries will shed light on life in outer space, which might exist in similar dark and airless conditions.]

    Recently, close-up pictures of Jupiter’s moon, Europa, shows signs of water beneath its icy surface. Once tested in Antarctica, robots could be sent to Europa to search for life there too.

10. What do scientists think about Lake Vostok?

解析：B。根据选项的关键词freezing、minerals、deep，推测问题可能与地理事物有关。录音中提到，科学家们猜想在沃斯托克湖中可能有微生物生存（micro-organisms may be living in Lake Vostok），B项与此内容相符，故为正确答案。

错项排除：录音中在提到glacier时指出，厚厚的冰川就像一块隔热毯，防止湖水结冰，A项的信息与此相反，故排除。C项中的rare minerals在原文中未提及，故排除。录音开头虽然提到了four kilometers，但说的是沃斯托克湖在冰盖下四公里处，而不是湖有四公里深，故排除D项。