单项选择题
A．Amusement at no cost B．Movies, Concerts and Shows C．The Cheapest Window—shopping D．The Most Enjoyable Street Musicians
A．old and young B．fat and thin C．tall and short D．beautiful and ugly
A．If you know your cycle you can make good use of time. B．If you know your cycle you can change it to fit your life. C．Father and son do not necessarily have the same cycle. D．Having a habit of doing something can make people affected less by their energy cycl