写一篇作文,英语,《你的朋友想要提高英语向你求助,谈谈你的学习方法...答:These days,many people become sick,especially have the flu.Every year,when the season changes, the flu spreads quickly.But how to prevent the flu?And what should we do then?First,we must do enough exercise everyday.We may play sports ,such as walking,running,doing morning ...