COVID-19（2019年新型冠状病毒肺炎）is terrible. It has caused a lot of troubles to the world. How can we keep ourselves safe from the virus？We should have some good habits. Wear surgical masks when there are many people around us. Cover our nose and mouth with paper towel when we cough or sneeze. Don't cover them with our hands directly. Wash our hands carefully after we come back home or before we eat something.
Keep the windows and the doors open when many students are in the classroom. Make our immune system（免疫系统）strong by doing more sport. Eat fully-cooked meat, fish and eggs.
B . 
C . 
