单项选择题
A．one should get up earlier if he wants to work better at his low point in the morning B．one can change his cycle C．whenever you feel hot, your energy cycle reaches the highest D．your cycle must be in the morning if you can get up early
A．Getting up late. B．Jumping out of bed as quickly as possible. C．Looking for clean clothes. D．Sitting for a while before getting out of be
A．how people can make their life fit their cycle B．whether everyone has a daily cycle or not C．why people have their energy cycle of body at different times D．what will happen in the family if the couple fail to realize which cycle each member has.