Doctor try to diagnose what makes people sick. If you have a sore throat or a bad cold, the doctor (tests/checks/interviews/examines) you with a stethoscope. The doctor uses the stethoscope to (hear/listen to/notice/note) your heartbeat and to the (noise/voice/sound/calling) your lungs make when you breathe. The doctor look into your nose, ears, and throat and may order some laboratory (examinations/tests/research/search). Then the doctor diagnoses your problem. Sometimes, the doctor orders drugs to help you.
Some doctors are specialists with extra trainning different kinds of soecialists (treat/cure/heal/remedy). Heart disease, cancer, and other diseases. Some of them only treat children or old people. Other specialists (operate/make/do/solve) surgery. They can take out diseased organs and even (cut/replace/bring in/take out) hearts, lungs, and livers. Some surgeons fix (twisted/bent/cut/broken) bones and replace knees and hips.