21-23 完整听下来了,21课出现了生词卫生间 bathroom,出现了形容词比较级larger,频繁出现12-19岁的青少年teenanger(可以作定语,teenage girl);
22课出现了汽油gas, 加仓gallon和加满fill it up;
23课出现了生词this, road, far, 句式 how far (how many miles) is it to Long Island,定语从句the road we want,以及在(介词)右边to the right,去右边go to the right,顺带提及了左边left.