What is the passage mainly about?
A.The new application of cellphones.
B.The predictability of one's routine.
C.The influence of cellphones on one's routine.
D.The factors that help determine one's routine.
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!