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1. It is a letter of _____.
2. Where will Zhangli return according to the letter?
3. What is the writer looking forward to?
4. They will win cooperation in the area of _______.
5. The writer wishes Mr. Peterson ______.
6. What is COVID-19?
7. Which one is not one of heath problems caused by COVID-19?
8. How long will most people with COVID feel better?
9. According to the passage, besides using soap to wash hands, what are the things we can do to stop germs from spreading?
10. If your school is closed because of the virus, where can you study?
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