24) 1. The president of the country is at the same time a supreme commander in chief.
2. At the beginning of war it was hardly possible for armies to reflect attacks of the opponent.
3. The siege of Troy which lasted many years went down in history.
4. At first armies sustained heavy losses, but then the situation considerably changed.
5. As a result of war hundreds of people become refugees.
6. The soldier are taught how to wage modern war.
7. The war cost many people's lives.
8. At those days thousands of people went to the army.
9. It is hard to conduct military operations simultaneously on several territories.
10. During war he went missing. As it turned out later he was captured.
25) Предполагаю, что так (на примере первых двух вариантов)
1. a) two six six six / b) twenty-six sixty-six
2. a) seven one three three / b) seventy-one thirty-three
3. zero eighty sixty-four / nought eight six four
4. three hundred ninety-one thousand forty-seven / three nine one nought four seven
5. twenty-seven ninety-nine / two seven nine nine
6. seventy-eight eighty-eight / seven eight eight eight
7. thirty-eight eleven / three eight one one
8. one hundred eighty-five thousand seven hundred ninety / one eight five seven nine nought
9. seven hundred seventy-seven thousand two hundred forty-three / seven seven seven two four three
10. five hundred four thousand eight hundred thirty-three / five nought four eight three three