3.Переведите предложения с модальными глаголами should, ought to.
Образец: Computers should (ought to) be used to control high-speed trains. ЭВМ должны использоваться (следует использовать) для управления ско-
ростными поездами.
All main lines should be serviced by high-speed trains. 2. Metro systems ought to be built in large cities. 3. The experience of operating fast trains on the Moscow-Leningrad line should be applied to other railways. 4. A more frequent service ought to be introduced at peak periods on heavily-used suburban lines. 5. A new design of the passenger car should be discussed in detail. 6. In order to attract more passengers our railways ought to be constantly improved. 7. The most heavily-used single-track lines should be double-tracked.