Unit 2 Changes in our lives词汇1.life(生活) 2.writer(作家) 3.street cleaner(环卫工人) 4.drive(驾驶) 5.poor(贫穷的;差的;次的) 6.wish(愿望;祝愿) 7.photographer(摄影师) 8.film(胶卷) 9.digital(数码的) 10.sweep(扫地) 11.broom(扫帚) 12.street sweeper(扫地车) 13.wife(妻子) 14.fairy(仙子;小精灵) 15.by hand(用手) 16.right away(立即;马上) 17.in a short time(很快) 知识点in the pastnow