五、任务型阅读。
阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有一项为多余选项。
Scientists are using satellites(人造卫星) to count Antarctic krill(南极磷虾) from space. These tiny creatures are just six centimetres long and look a bit like prawns(明虾)，but they are more important. 1.
Scientists need to watch and count krill so they can check the health of the places where these animals live. However, in the Southern Ocean, where they live, there are more than 700 trillion adult Antarctic krill. That's like trying to count all the stars you see at night! 2. Even if we have special cameras and computers to help.
3. They study the colour of sea water from space. The amount of light the ocean absorbs changes depending on how many krill are in it. Dr Cait McCarry, from the University of Strathclyde, said, "We start with sea water. Then we add a krill and take a measurement(测量) of how much light the water takes in. 4. "
By comparing pictures taken by satellites, scientists will be able to guess how many krill live in different ocean areas. 5. This will also show how they're spread across different areas and how climate change and fishing affect them.

1. D 2. E 3. A 4. B 5. F