题目内容：

In 1863 the first underground passenger railway in the world opened in London. It 1. （run） for just under seven kilometers and allowed people to avoid terrible crowds on the roads above as they travelled to and 2.work. It took three years to complete and was built using an interesting method. This included digging up（挖掘） the road, laying the track（铺设轨道） and then building a strong roof over the top. With all those 3.（accomplish）, the road surface was replaced.

Steam engines4.(use) to pull the carriages（车厢） and it must have been 5.(fair) unpleasant for the passengers, with all the smoke and noise. However, the railway quickly proved to be a great success and within six months, more than 25, 000 people were using it every day.