Question

Telegraph and telephone (1)____(to be) both wire-based electrical systems, and Alexander Graham Bell’s success with the telephone (2)___(to come) as a direct result of his attempts to improve the telegraph. When Bell (3)___(to begin) experimenting with electrical signals, the telegraph (4)___(to be) an established means of communication for some 30 years. Although a highly successful system, the telegraph, with its dot-and-dash Morse code, basically (5)___(to limit) to receiving and sending one message at a time.

Answer 1

1) to was

2) to came

3) to began

4) to were

5) to limited

Вроде так)

Answer 2

Ответ:

Telegraph and telephone are both wire-based electrical systems, and Alexander Graham Bell’s success with the telephone came as a direct result of his attempts to improve the telegraph. When Bell began experimenting with electrical signals, the telegraph was an established means of communication for some 30 years. Although a highly successful system, the telegraph, with its dot-and-dash Morse code, basically limited to receiving and sending one message at a time.

Answer 3

1. were
2. came
3. began
4. had been
5. was limited