完形填空

    Yesterday evening，when l went to town with my  1  ，we met a strange old man．It was raining ham and we had no  2 ．We were trying to get into a taxi when he came up to us．He was 3  a nice umbrella and he said that he would give it to us for only a pound．He had forgotten his   4 ，he said，needed taxi—fares(出租汽车费)to go back home．My mother didn't believe  5 he had said at first，and asked him a lot of questions．Finally we bought it and he left  6 ．We followed him and found he went into a pub(小酒店)and  7  himself a glass of whiskey(威士忌)with the pound．

8 he drank it，he put 9   his hat and took up one of the many wet umbrellas at the entrance and went off．Soon after that，he sold it again．What a(n) 10  experience I had !

下图所示是两种细胞结构的示意图。

秦朝“半两”钱，汉代“五铢”钱，铜币主要以重量为名。武德四年（621）唐高祖下诏铸“开元通宝”钱，此后历代钱币上不再标识重量，币值与钱币重量逐渐脱钩。这一变化产生的影响是（    ）