Unit 3,Seeing a Doctor,Part B,open,a lot of,medicine,doctor,cross,street,I have a stomachache,You mustnt go to school,I have a headache,You must drink more water,I have breathing problem,You must go to bed earlier,I have a toothache,You must go to see the doctor soon,I have high blood pressure,You must eat the medicine on time,I have a,You must,I have a,You must,I have a,You must,1,Show your health problem to your friends. 2,give advice to your classmates