该话题主要分布在：
Reading: What would you do if---? Unit 4 what would you do? BⅢ
常用单词：
accident事故, problem问题, advice建议, first-aid急救, knee膝盖, shelf架子,
cut割、刀口, cover覆盖, burn烧、火烧处, hurt伤害、受伤, offer提供,
nearly差不多, deep深的, correct正确的, helpful有帮助的,
常用词组：
give advice on---给关于---的建议, in different situations在不同的情景里,
an internet friend一个网友，cut/burn oneself by accident无意中割/烧到自己, cover---with---用---盖住---, press---hard用力压住---,
fall downstairs从楼梯上滚下, injure one’s knee伤到某人的膝盖,
call the hospital first先打电话给医院,
get the medical help first先获得医疗帮助,
