[解析]
(1)B.细节理解题.根据第一段1,2行Mr.Harris used to work in Dover,but then he changed his work,and he and his wife moved to another town Harris先生和他的妻子搬到另一个城镇因为Mr.Harris改变了他的工作.故选B.
(2)C.细节理解题.根据第二段Then Mrs.Harris said to her husband,"We've been to a lot of other people's houses,and now we must invite them to our house,mustn't we?"说明他们去了很多朋友的家里参加聚会,现在轮到他们请别人过来了,故C正确.
(3)C.推理判断题.根据Mrs.Harris was beginning to write the invitations when her husband saw that she was writing,"Party:6:30 to 8:30 p.m."说明她原计划从6点30到8点30,大约2个小时,故选C.
(4)C.推理判断题.根据文章In fact they were still there at mid﹣night when the door bell rang and a policeman arrived.说明聚会到了半夜,那么选项中只有C项符合要求,故C正确.