精选优质文档-倾情为你奉上高中英语完形填空与阅读理解练习1、 Sometimes people call each other scared-cat, but have you ever thought about this expression? When a cat is frightened, its heart starts beating faster, its muscles get tense, and there are changes in the chemicals in its blood stream. Although the cat doesnt 1 this, its body is getting ready for action. If the danger continues, this animal will do one of the two things. It will 2 itself, or it will run away as fast as it can. 3
