Question

Поставьте глаголы, данные в скобках в правильную форму: 1. Metals (to use) by man after wood and stone. 2. Engineering metals (to use) in industry in the form of alloys. 3. Different metals (to produce) in different ways. 4. The first metal which (to produce) by people was copper.

Answer 1

1) has been used
2) using
3) producing
4) was produced

Answer 2

Ответ:

1) has been used

2) using

3) producing

4) was produced

Объяснение:

Answer 3

1. Metals have been used by man after wood and stone. 2. Engineering metals are used in industry in the form of alloys. 3. Different metals are produced in different ways. 4. The first metal which was produced by people was copper.