介绍:
Day21
1我常帮我父母做家务。
I often help my parents with the housework.
2所以这些学生靠滑铁索来过河上学。
So these students go on a ropeway to cross the river to school.
3亮亮，一个11岁男孩，每天过河上学。
One 11-year-old boy,Liangliang,crosses the river every school day.
4前置定语，复合形容词还有：
一本30页的书a 30-page book/
一个三间屋的房子a three-room house
大家还在听
