BCCB
本文告诉我们伦敦地铁建立的原因以及在建设过程中遇到的问题。
1.B 考查细节题。根据Fans had to be put in the tunnels later to keep the air clean enough for people to breathe.可知答案为B。
2. C考查细节题。根据the government was looking for a way to reduce traffic problems in the city of London. The poor areas of the city were so crowded with people that it was almost impossible for horse carriages to get through.可知,C为正确答案。
3.C 考查推断题。根据第二题可知,建立地铁就是为了减轻交通压力,故地铁减轻了交通压力。故C正确。
4.B 考查猜词题。根据后一句第一年承载了9百万人可知,变得流行了起来,故答案为B。