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            ¡¡¡¡A. Don¡¯t cough or sneeze in front of people.
            ¡¡¡¡B. Don¡¯t stand beside someone who coughs or sneezes.
            ¡¡¡¡C. Many people cough or sneeze on the underground train.
            ¡¡¡¡D. Cover your mouth when coughing or sneezing and say sorry.
            ¡¡¡¡39. After coughing or sneezing on their hand, students are advised to ________.
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            ¡¡¡¡To: suhua@china.com.cn
            ¡¡¡¡From: johnsmith@yahoo.com.ca
            ¡¡¡¡Subject: summer vacation
            ¡¡¡¡Dear Su Hua, I¡¯m conducting a survey on how students spend their summer vacation in different countries. I need your help. Would you mind answering the following questions? ¡ñ When do you start your summer vacation and how long is it? ¡ñ How do you go to a summer school? Why or Why not? ¡ñ Will you go to a summer school? And why? I look forward to hearing from you soon. Best wishes, John
            ¡¡¡¡To: johnsmith@yahoo.com.ca
            ¡¡¡¡From: suhua@china.com.cn
            ¡¡¡¡Subject: summer vacation
            ¡¡¡¡Dear John,  Thank you so much for your email. I¡¯m very happy to answer your questions.
                I wish to visit you in Canada one day. Yours,  Su Hua
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            ¡¡¡¡One possible version:
            ¡¡¡¡Dear John,
            ¡¡¡¡Thank you so much for your email. I¡¯m very happy to answer your questions.
            ¡¡¡¡In China, we start our summer vacation at the beginning of July. It lasts about two months. We can do many things to relax ourselves in summer vacation. I often go swimming, surf the Internet and watch TV. I will go to a summer school for a month to study English because it is important and I like it. But what I want to do most is traveling with my parents. We have been to many places. This summer, we are going to Beijing. We always have a good time.(90´Ê)
            ¡¡¡¡I wish to visit you in Canada one day.
            ¡¡¡¡Yours,
            ¡¡¡¡Su Hua

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