13. If you go to London, you can see a lot of buses and cars on the roads. You can also see many bikes because more people go out by bike. Why? There are many reasons (原因). First, it is very cheap to buy a bike. And then people often need to wait for (等待) a bus for half an hour. Finally, when the bus comes, there are so many other buses and cars on the roads, so the bus moves very slowly.
I go to work by bus for about four years. I often arrive at work late and feel tired. One day, a friend of mine says, "I go to work by bike. Why don't we go to work together?" "My bike is old. I leave it at my home for a long time. And there are so many buses and cars on the roads," I answer. "Don't be afraid. If you follow me and we ride slowly, you'll be fine," he says.
Later, I buy a new bike. We ride slowly, but we arrive at work quickly. It takes me about 40 minutes to go to work by bus, but only half an hour by bike! Now I love riding a bike. And I feel healthy. Many people think my idea is good and maybe you can see more bikes on the roads in London.