Укажите do / does / am / are / is.
1. ..railway maintain the road bed?
2. ..Metro the speediest?
3. ..drivers have a rest after 3 hours of work?
4. ..movement of freight start at the terminal?
5. ..cars classified depending on destination?
6. ..the length of rail 39 feet?
7. ..the weight of rail 94 pounds?
8. ..railways maintain locomotives in good order?
9. ..maintenance of equipment a serious problem?
10. ..diesel locomotives serviced at depot?