Students must help their parents do some housework and do their homework on time
学生应该帮助父母亲做些家务活并且应该要按时完成作业
Studnes must not throw the paper on the road
学生不应该在马路上丢纸屑
Students must help their parents do some housework and do their homework on time
学生应该帮助父母亲做些家务活并且应该要按时完成作业
Studnes must not throw the paper on the road
学生不应该在马路上丢纸屑