七、信息还原。
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。选项中有两项为多余选项。
Many have heard of shark fin soup. But do you realize that you're killing a whole shark each time you enjoy a bowl of shark fin soup?
When people catch sharks, they cut off their fins and throw the sharks back into the ocean.
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Without a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the ocean ecosystem.
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Many believe that sharks can't become endangered because they are the strongest in their food chain.
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The number of some kinds of sharks has fallen by over 90 per cent in the last 20 to 30 years.
Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about "finning".
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So far, no scientific studies have shown that shark fins are good for health, so why eat them?
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A. Help save the sharks!
B. They are in great danger now.
C. This is not only cruel, but also harmful to the environment.
D. But in fact, more than 20 million sharks acaught and traded in this industry every year.
E. If the number of them drops too low, it will threaten(危及) all sea life.
F. They have even asked governments to make laws to stop the sale of shark fins.
G. This is a big problem, especially on foggy and rainy nights.
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