阅读下面短文,从短文后各题所给的A、B、C和D四个选项中,选出可以填入空白处的最佳选项。
Long long ago, in a small village, there was a place with a house of 1, 000 mirrors(镜子). A little dog learned about this place. He wanted to1it. One day, when he got there, he 2the steps(台阶) and went into the house happily. He looked around with his ears up high. His tail wagged(摇摆) as fast as it could. Then he got a big3. He found himself looking at 1, 000other happy little dogs. Their tails were wagging as fast as4. He had a great smile(微笑) on the face. Then he was answered with 1, 000 great smiles. They were warm and 5, too. He went out and thought to himself, "This is a nice6. I will come back and visit it often. "
In the same village, there was another little dog. He often felt unhappy. He wanted to visit the house of 1, 000 mirrors, too. One day, 7_he got there, he climbed up the steps slowly. He looked into the door with his head down and saw 1, 000 unfriendly 8 looking back at him. He shouted at them, then he was so scared to see 1, 000 little dogs 9 back at him. After he left the house, he thought to himself, "What a terrible place. I will 10go back there again. "
Mirrors can't change, but faces can. Face the world with a smile. The world will smile to you.