词组：(包括四会和三会的词组)
go for a walk(= have a walk, take a walk) 散步 be glad to do sth. 乐意做某事
have a chat (with sb.) （与某人）聊天 a twin sister双胞胎姐姐（妹妹）
twin sisters(brothers) 双胞胎姐妹（兄弟） look the same 看起来很像
the only child 唯一的孩子 a cute little dog 一只可爱的小狗
be good at 善于，擅长. do well in 在……方面能干
have problems with 在……方面有问题 a football player 足球运动员
some of the boys 部分男孩子 jog to school 慢跑去学校
after school 放学后
Unit 6 Where’s your pen pal from?-