含了不同时期的艺术品。故选D项。

　　3．Why was the Metropolitan Museum of Art built?

　　A．To show the owners' pride in its large size.

　　B．To invest and make more money in the future.

　　C．To offer art education to the American people.

　　D．To bring the worldwide artists' dream into reality.

　　解析：选C　推理判断题。根据最后一段倒数第二句"They all shared the same passion of bringing art and art education to the American people."可推知，大都会艺术博物馆的建立是为了给美国人民提供艺术教育。故选C项。

　　B

　　A crow (乌鸦) lived in the woods and was satisfied with his life. But his life changed when he saw a swan (天鹅). "He is so white，" he thought, "but I am so black. He must be the happiest bird in the world."

　　He expressed his thoughts to the swan. "Actually，" the swan replied, "I thought that I was the happiest bird until I saw a parrot (鹦鹉), who has two colors."

　　The crow then went to the parrot. The parrot said, "I lived a very happy life until I saw a peacock (孔雀), who has many colors. I now think the peacock is the happiest bird."

　　The crow then visited a peacock in the zoo. "Dear peacock，" the crow said, "you are so beautiful. Every day lots of people come to see you. You must be the happiest bird on the planet."

　　The peacock replied, "I always thought that I was the most beautiful and happiest bird on the planet. But because of my beauty, I am kept here. I examined the zoo very carefully and found that the crow is the only bird not kept in a cage. I hope that I could become a crow, so I could fly around freely."

　　That's our problem, too. We make unnecessary comparison (对比) with others and become sad. We don't value what we have. This leads to unhappiness. Learn to be happy with what you have instead of looking at what you don't have. There will always be someone who has more or less than you have. Those people who are satisfied with what they have are the happiest in the world.

　　语篇解读：本文是夹叙夹议文。我们不应该跟别人进行不必要的比较，因为那样会让我们没有幸福感。记住：我们应该知足常乐！

　　4．After seeing the swan, the crow .

　　A．wanted to become beautiful

B．decided to leave the woods