完形填空 One evening last week my wife and I were sitting_ 1___a

完形填空 One evening last week my wife and I were sitting_ 1___at home.

One evening last week my wife and I were sitting quietly at home.She was looking at the television while I was reading a book.Suddenly we heard a loud bang.I supposed that the old lady in the flat above ours was moving the furniture about.My wife was afraid that the noise would wake the baby.She turned down the television and a moment later we heard someone calling for help.
　　I ran upstairs.The old lady's door was shut but I could see smoke coming through the letter box and under the door and could smell something burning.'The flat is on fire',I shouted down to my wife.'Ring the fire brigade'.
　　I banged on the door but the old lady took a long time to answer.I was turning over in my mind the idea of breaking the door down when she finally appeared.
　　'I was having a bath,' she said,'when the water heater in the kitchen blew up.'
　　'Why didn't you open the door?' I asked her.
　　'I was getting dressed when you knocked,' she said,looking embarrassed.
　　I took her downstairs to our flat.Then I ran back,went inside the old lady's flat and turned the gas off to prevent another explosion.Smoke was pouring out of the kitchen and the heater was in flames.Just then I heard a fire engine arriving outside and the heavy footsteps of the firemen on the stairs.I looked round and noticed two of them standing in the doorway.'It's in here,' I said,'You turned up promptly,I must say.'
　　When I got back to our flat my wife was making the old lady a cup of tea.Soon afterwards,the fire chief came in to ask some questions.It turned out that the fire was not very serious and the firemen were already putting it out .When they left my wife went up with the old lady to help her clear up the mess.
　　When she returned,my wife remarked:' It's all right now.Nothing was damaged except the heater.But wasn't it lucky that Baby slept through all that noise?
　　She took the teacups into the kitchen and I heard her scream and the cups crash to the floor.The baby woke up at last and started to cry.