题目

战国时期，各国货币差别很大，影响各地经济交流，秦统一六国后，秦始皇规定在全国统一使用（ ） A . B . C . D . 答案：B And from that day on， as soon as the table was cleared and the dishes were gone．Mother ________ disappear into her sewing room to practice． [　　] A．might B．would C．should D．could