помогите пожалуйста Ex. 10. Put tail-questions to the following sentences.1. In

Поначалу находим глагол-сказуемое (выделены подчеркиванием) и определяем по нему время, потом образуем "хвостик":

1. In New York, most people go to work by subway, don't they?

2. The service life of steel sleepers is from 35 to 60 years, isn't it?

3. About 60 % of the world's railroad network has been built to standard gauge (1,435 mm), hasn't it?

4. Transport plays a very important part in the development of economy, doesn't it?

5. At Richmond, a lot of passengers got off the train, didn't they?

6. Each one of your suitcases will be checked when you go through the customs, won't it?

7. Susan has bought a newspaper and a magazine to read on the train, hasn't she?

8. Competition between different modes of transport is intensifying now, isn't it?

9. The Disneyland train called The Excursion was built specially for carrying visitors through the Grand Canyon Diorama, wasn't it?

10. When inactive, locomotives are housed in a train depot,  aren't they?

11. Perishable (скоропортящиеся) goods should be carried in refrigerator cars, shouldn't they?

12. The automatic train control facilitates (облегчает) the work of a locomotive driver, doesn't it?

13. Long-welded rails (бесстыковые рельсы) have been used on main railways since 1960s, haven't they?

14. The US ranks first in the world in the volume of freight traffic, doesn't it?

15. The construction of the railway bridge had been completed by the beginning of the navigation season, hadn't it?