【正文】
a dialog. 1. exercise often 2. keep the air fresh 3. go to bed early 4. wash hands and change clothes often 5. keep our rooms clean 6. drink enough water 7. take some medicine 8. keep away from crowded places □ □ □ □ □ □ □ □ √ √ √ √ √ 1. May I ask you some questions, Dr. Li? Sure, go ahead. 2. What should we do to prevent it. 5. Must we go to see a doctor at once when we have the flu? 3. First...second... third...finally... 4. We should exercise often to build us up. 6. We39。 2. 背 1a以及 P(43)(44)的單詞。t 2. I do exercise every day to_______ A. build up me B. build me up C. build me down