Обусловьте функции глаголов to have, to be , to do; переведите

Обусловьте функции глаголов to have, to be , to do; переведите предложения.

1.Perhaps the principal cause of the telephone inefficiency is that although the standard telephone allow a customer to perform oral communication, it doesn't yet transmit visual communication.

2. Of course, long-term sustainability is exactly why local competitors are in business: to get there experts say, theyll gaveto do a lot more than serve as an alternative billing agent for.

3. Once profits are on the line, the network organization begins to examine and carefulle manage its cost-leading to better efficiency, profitability, and lower prices

4. Load coils were frequently added to loops longer than 18,000 feet

5.We hame all suffered from the irritating waste of time caused by bad telephone manners.