Ex.2. Вставьте am (not), are (not), is (not) и переложите предложение: (письменно) 1. I a student of mining.
2. Crop and animal farming ... the main branches of agriculture.
3. The manager... in the office.
4. Agriculture and manufacturing ... important in all economies.
5. You ... a student. You ... a manager of an agricultural company.
6. Crop farming ... possible in the central regions of Russia in early spring.
7. I... a student of medicine, I... a student of the economics department.
8. Fuel... important for all industries.

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