【题目】In those days, the old woman________ sit at the door for hours, waiting for her son to return from abroad.
A.could
B.should
C.might
D.would

【答案】D
【解析】句意：在那些日子里，这位老太太长坐在门口几个小时，等她的儿子从海外回来。考查情态动词。用would表示过去的习惯性动作。故选D。