Q: What type of transportation do you use when you go to school? [Why?]
A: I frequently take the subway to school. When people are rushing to work and school, there is always heavy congestion on the roads. Cars hardly move so I cannot estimate the exact time when I'll be arriving at my school. Moreover, it is economical and convenient to take the subway since there is a subway station near my home and school, not to mention the subway train arrives every few minutes and on time.
我经常乘地铁上学。当人们赶着去上班和上学的时候，路上总是很拥挤。汽车几乎不动，所以我无法估计到学校的确切时间。而且，乘地铁既经济又方便，因为在我家和学校附近就有一个地铁站，而且地铁每隔几分钟就到，而且准时。
take the subway 乘地铁；
underground、metro都可表示地铁
rush to 匆匆忙忙地
heavy congestion 交通严重拥堵
estimate the exact time 估计准确的时间
economical 实惠的; 节约的 (economic 经济的、经济学上的)
convenient 方便的
not to mention 更别说
拓展内容：
transportation 交通
traffic jam 交通堵塞
metropolitan area 都市区
private car 私家车
unpredictable 难以预料的
public transportation 公共交通工具
environmentally friendly 环保的
