21、Beijing-Shanghai Railway was completed in J968．The line runs1,462 km between China’s two main cities and passes through five provinces and the city of Tianjin．

    Since opening，it has been one of the busiest routes in our country．The Beijing—Shanghai route is now served by 10 trains a day．Five of which are non-stop．The journey time is just under 12 hours．Now trains are allowed to travel at 250 kph(kilometers per hour)and the journey time is only 10 hours．

    With the sixth railway，speedup．China has Joined the ranks(行列)of countries with high—speed rail services．Trains are able to run at speeds of 200 kph on some 6,003 km of track (轨道)，and on some sections，the highest speed can increase to 250 kph．The 6,003 km of track serves both high-speed passenger trains and low—speed cargo(货物)trains．

    Railway operators have to deal with the problem of the speed gap(差距)between the two kinds of trains to make sure they both run safely．

根据短文内容，选择正确的答案。

1．The Beijing-Shanghai Railway line runs 1,462 kilometers，doesn’t it？

A．Yes．it does    B．No，it doesn’t    C．it’s very far    D．We don’t know

2．How many times have the trains been speeded up so far？

   A．Five．    B．Six．    C．Seven．    D．Eight。

3．When tile Beijing-Shanghai train Flirts at 250 kph，the passengers spend ________ on the train．

  A．ten hours    B．twelve hours    C．one day    D．two days

4．Which of the following sentences is TRUE?

   A．Only one train is served on the6,003 km of track．

   B．Beijing-Shanghai Railway passes through six provinces

   C．All of the trains run without any stops on Beijing-Shanghai Railway．

   D．Since opening，Beijing-Shanghai Railway has been one of the busiest routes in China．

5．The passage above is probably from __________．

   A．a story-book      B．a dictionary    C．a newspaper    D．an advertisement