2014
高考英语阅读理解抓分练习精品（6）及答案 the united states is faced with serious traffic problems. too many cars travel on the freeways to and from the city. this heavy traffic causes delays and lots of pollution from cars that are using their engines but not moving anywhere. many cars going nowhere is called a “traffic jam.” while many cities in the united states have traffic problems, some of the worst are in los angeles, california. los angeles is a big city with a large downtown area. one of the reasons why there is so much traffic is that few peop
