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 !
2AB（g），达到反应限度的标志是
