15时40分-7时35分=8小时5分．
答：经过8小时5分．
故选：C．
农产品差价包括（）。
A.数量差价
B.季节差价
C.地区差价
D.批零差价
Little Tom decided to ______ the bad habit of sleeping in class.
A．make up
B．call up
C．look up
D．give up
