cheer up使振奋，使高兴起来a piece of一片，一块
give out分发，发放Unit11
put off推迟department store百货商店，百货公司set up建立，创立，开办water slider水滑道
think up想出dress up穿上盛装，装扮take after相像Unit12
fix up修理，修补shake hands握手
ask for要，要求，请求drop by顺便拜访
hand out分发， 发放after all毕竟，终究
work out产生结果，发展make a noise制造噪音
help (sb) out帮助某人解决困难go out of one's way to do特地做某事
at once立即，马上make sb. Fell at home使某人感到宾至如归Unit 9table manners餐桌礼仪
be used for用来做…be/ get used to doing习惯于…
by mistake错误地learn…by oneself自学
by accident偶然地，意外地Unit13
according to根据，按照pros and cons赞成与反对，正反面fall into落入，陷入aim at瞄准，对准，针对in this way这样at times有时，偶尔
flying disk飞碟，飞盘to start with首先
knock into与…相撞Unit 14
Unit 10bathing suit游泳衣，泳装
by the time到…时候，到…之前clean out清除，把…打扫干净go off发出响声get back to sb.过一会与某人通话run off跑掉，迅速离开lead singer主唱者
on time准时some day有朝一日
break down停止运转，出故障be off离开，走开
show up出席，露面so far到目前为止
April Fool's Day愚人节thanks to幸亏，由于
set off引起，激起look forward to doing盼望，期待
sell out卖完，售光Unit 15
get married结婚care for关心，关怀，照顾