问题
选择题
Everyone should learn something about first aid,for every second will ________ in an emergency.
A.play
B.count
C.happen
D.show
答案
答案:B
句意为:每个人都应该学点急救知识,因为在紧急情况下每一秒都很重要。play玩; count起关键作用;happen发生; show展示。