阅读下面材料，然后从各题所给的四个选项中选出一个最佳选项。

    There are about 7,000,000 people in London. London is one of the big cities in the world. London is famous for many things. People from all over the world come to see the famous buildings. There is a famous clock called Big Ben, too.

    Like many big cities, the traffic is very busy in London. When the work hours begin, over 1,000,000 people use the London underground(地铁), but there are still too many buses and cars on the streets. The air isn't clean.

    For me, the best things about London are the parks. There are five in the middle of the city. But my children's favorite is playing in Hamleys, the biggest toy（玩具） shop in the world.

    People in India call New Year "Diwali" or "the Festival of Light(光)".

They often clean their houses before the day of Diwali. Most people clean their houses in the morning. They often decorate their houses with flowers. They also make sweet food look like flowers, people and animals. Then they visit their friends and give them presents and cards.

    On New Year's Day, many people open the doors and windows and light(点亮) candles in front of the doors. They want to bring good luck to their families. After Diwali, people often dean their houses again. Some people like to make loud noises at their houses. They think this can make bad spirits(幽灵} go away.