But there is something more about the new H7N9 bird flu. Unlike the H5N1 bird flu, which causes severe sickness in birds, the H7N9 has been evolving under the radar (悄悄地) since it travels between birds without causing noticeable illness. That makes it difficult to keep track of the disease.

　　The good news is that there’s so far no sign that the virus is spreading from person to person. But since there is no vaccine for the disease yet, the World Health Organization recommends that you wash your hands after meeting with sick people and before and after you eat or prepare food, and they also suggest avoiding contact with birds or their eggs.

　　1. Which of the following statements is TRUE according to the text?

　　A. The H5N1 bird flu turned out to have something to do with the SARS epidemic.

　　B. More than 600 people across the world died from the H5N1 bird flu ten years ago.

　　C. Most of the mutations of the proteins in the bird flu virus are harmful to both birds and humans.

　　D. The name, H7N9 bird flu, shows that there have been new mutations of the proteins in the virus.

　　2. With the example of the SARS epidemic in Paragraph 5, the author intends to　.

　　A. introduce where the SARS virus came from

　　B. inform us of the harmful effects of the SARS epidemic ten years ago

　　C. show the horrible effects an animal influenza virus can have once it spreads to humans

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