The key answer of exercise 4

a)

1. Man will not / won't fly for fifty years. (1901)
2. There isn't going to be any German reunification this century. (1984)
3. Democracy will be dead by 1950. (1936)
4. By 1980 all power (electric, atomic, solar) is likely to be almost free. (1956)
5. ✓
6. Man will never reach the Moon. (1957)
7. Television won't matter in your lifetime or mine. (1936)
8. The internet may become useful for business but never for the general public. (1989)

b)

1. Man will fly within fifty years.
2. There is going to be German reunification this century.
3. Democracy won't be dead by 1950.
4. By 1980 all power (electric, atomic, solar) isn't likely to be almost free.
5. The Japanese car industry is likely to be successful in the US market.
6. Man will reach the Moon.
7. Television will matter in your lifetime and mine.
8. The internet will become useful for business and also for the general public.