三、阅读表格，选择正确的答案。
　　Ways to work
　　Read the table and answer the questions. It shows how metro, bus, and bike are different.
　　　
　　词汇积累speed /spiːd/ 速度　　cost /kɒst/ 费用　　environment /ɪn'vaɪrənmənt/ 环境
　　(　　　)1. What is the fastest way to work?
　　　　　
A. By metro.　　　　　　B. By bus.　　　　　　　C. By bike.
　　(　　　)2. If you don’t want to use money, which way can you choose?
　　　　　
A. By metro.　　　　　　B. By bus.　　　　　　　C. By bike.
　　(　　　)3. If you want the easiest way to go to work, what should you choose?
　　　　　
A. By metro.　　　　　　B. By bus.　　　　　　　C. Both A and B.
　　(　　　)4. Why might someone ride a bike?
　　　　　
A. Because it's fast.　　B. Because it's free and good for the environment.
　　　　　
C. Because it's the easiest way.

1~4 ACAB
1. fastest意为“最快的”，三种交通方式中最快的是地铁，故选A。
2. 由表格中“No money”得知，自行车不花钱，故选C。
3. easiest意为“最简单的”，乘地铁是最简单的，故选A。
4. 骑自行车既免费又对环境有益，所以选择B。