单项选择题
A.the number of crimes done by young people B.the number of crimes done by adults C.the number of crimes done by school students D.the number of prisons
A.About one hundred and seventy thousand. B.About one hundred and seventy million. C.About one hundred and seventy billion. D.About one hundred and seventy.
A.Because he didn't like other shoes. B.Because he couldn't walk easily with his shoes. C.Because his shoes were too expensive. D.Because he wanted other people to admire him.