根据句意及首字母提示补全单词 1. Kangkang's father is a doctor. He is very busy right now. He is e_______ the patients. 2. —Would you m_______ lending your dictionary to me? —Not at all. Here you are. 3. Tom, staying up late is bad for your h_______, so go to bed early next time. 4. I'm feeling t_______. I cough day and night. 5. We should try to i_______ our environment.