A．a bike　　　　 B．bike　　　　  C．bikes　　　　 D．a bikes

China is a country that is changing very quickly over the past fifty years and   36   you look closely(仔细地) you can see it   37   in front of your eyes. Fifty years ago, everybody travelled around by bike. Today lots of people in China still ride their bikes 38   school or work, but many people also take the bus or travel   39   underground. There are some people who even drive their own cars. Shops   40   small businesses but now the centre of China’s cities are full of   41    department stores. In these department stores, you can buy   42   you want in one trip. You can buy food, toys, bikes and even televisions. Television is   43 change that China has seen. Many children would say that they can not imagine life   44   , but years ago they had to live without them. The Internet and the computer have only recently become regular items in our lives. Without the Internet, people would not   45   to get information as quickly as they can now and the Internet helps people be friends all over the world. Computers help both children and adults in their everyday lives Many students are lucky enough be able to use them to do their homework or chat with their friends and sometimes play games.

Is that your _______?