1. What did Alexander Bell's father invent?
His father was a world-famous teacher of speech and the inventor of a system which he called “Visible Speech”.
2. Whom and where did Alexander Bell teach?
Alexander chose the same profession, and as his father became a teacher of the deaf, he moved to the United States and began to teach deaf children to speak.
3. What did Alexander Bell begin to work at when he was nineteen years old?
In 1866, the nineteen-year-old Bell started thinking about sending tones (звуки) by telegraph. It was then that there came to his mind the idea of the "harmonic telegraph"
4. What device did A. Bell use which made his invention work well?
At last they decided to try a new kind of transmitter (микрофон). The new transmitter was set in Bell's bedroom. Watson was sitting in the laboratory. He put his car to the receiver (трубка) and was waiting. Suddenly he heard Bell's voice. And not the voice only but the words too. ( только здесь я не уверен на 100% что правильно, так что извините заранее)
5. How many years later was the first transcontinental telephone line opened?
In 1915, the first transcontinental telephone line was opened.
6. Who made the first test of the transcontinental telephone line between New York and San Francisco?
Graham Bell, a very old man now, sat in New York at a desk with a telephone before him, while his friend Watson was listening more than three hundred thousand miles away in San Francisco.