完形填空。 A man and his wife had a dog to keep their house. When they went out, they always left the dog inside the house. One evening they wanted 1 to the cinema, 2 they left the dog in the house and locked the door and their 3 . They 4 in their car. When the film finished, they came back home. They opened the gate and put the car 5 . But when they came to the front door, they found that part of the glass 6 the door was broken. The door was unlocked and 7 . A robber (窃贼)! They went in and quickly looked in all the rooms to see 8 things the robber had taken. But everything was in the 9 place and nothing at all 10 . The dog 11 in the sitting room on the floor. The lady was 12 the dog. "Why didn't you keep the house ?" she said. The dog was 13 to see its owners. It began to wag (摇) its tail (尾巴) and then it went to a corner of the room and picked up something in its mouth. It went to the lady and 14 the thing at her feet. When the lady went to pick it up, she gave a scream (尖叫). Can you guess what the dog's present was? It was…a…man's 15 .