1.  Adtranz manufactures electric and diesel locomotives, high-speed trains, streetcars and underground trains, and signal and traffic-control systems.

2.  An underground train system is expensive to build.

3.  Buses and underground trains were so expensive that it was no longer accurate to regard them as public transport.

4.  I once read a case in the newspaper about a man who jumped in front of an Underground train.

5.  Recent power surges disrupted underground train service between the terminal and concourses.

6.  The fastest way from there to the Embankment was to take an Underground train from Euston.

7.  We had seen the little underground train which congressmen rode and we had visited one of our senators in his office.

8.  Yet Laura failed to conquer fully her fear of water or enclosed places and was never able to use underground trains.

9.  They were joined by underground train drivers in the capital.