13. Заполните пропуски, используя глаголы, данные в скобках, в нужном времени активного или страдательного залога.

1. The worker almost never (to make) a complete product.

2. Each operation ... (to be) a specific task of one worker.

3. The production of relatively simple things may ... (to break) into hundred separate operations.

4. Adam Smith ... (to provide) what... (to have) now... (to become) the most celebrated account of specialization.

5. If the whole operation ... (to carry out) from start to finish by one employee, he would ... (to be able to) make only a few dozens each day.

6. Why should specialization ... (to lead) to such great increases in productivity?

7. No time ... (to waste) in moving from one job to another.

8. The division of labour ... (to make) possible a much greater use of machinery.