21. You _________forget what I told you. It’s very important. A. mustn’t B. needn’t C. don’t have to D. can’t 22. Cool the burns immediately so as to _________tissue damage. A. ease B. relieve C. minimize D. maximize 23. _________is a long stick that someone put under their arm to help them walk when they have hurt their leg. A. Crutch B. Wheelchair C. Stretcher D. Bandage 24. These medicines can _________your headache. A. ease B. elevate C. revive D. affect 25. Don’t overheat the victim with blankets or coat. A. make someone too hot B. make someone too cold C. hurt someone D. destroy someone