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 !

不能与烟共舞，吸烟有害健康，在空气不流通的房间里，只要有一个人吸烟，整个房间都会充满烟味，这主要是因为（   ）