VII. Перепишите следующие предложения и переведите их, имея в виду различные значения to be, to have, to do. 1. The electric current is a quantity of electrons flowing in a circuit per second of time. 2. These components are to be installed. 3. No electric device has only advantages. 4. They haven't met since their schooldays. 5. He has to stay in town for two days. 6. A cur- 23 rent which does not change its polarity is called a direct current. 7. If you don‘t ask me, I shall not do it. 8. Any conductor has some definite value of inductance.