Здравствуйте , Уважаемые эксперты! Пожалуйста, ответьте на вопрос:

помогите пожалуйста найти в след.предложениях глагол-сказуемое, определите его время, вид и залог. Например: is based – Pr. Simple Passive
1. Despite the apparent properties of compound semiconductors, their general use has not been great because of several limitations.
2. The potential difference across the junction had been increased.
3. Magnetic amplifiers have been employed for some 50 years; transistors were reported upon in 1948.
4. Sometimes a decision to compute is followed by a process of selecting the particular kind of computing machine, which best suits for the given problem.
5. Our rockets, the first in the world, were being sent to other planets.
6. This problem must be approached from another point of 47 view.
7. This job cannot be done for a short period, you need at least a month.
8. It is 20 years since he left home, and he has never been heard of since.
9. Tell him he is being waited for.
10. L. Carroll is remembered not as a mathematician but as the author of Alice in Wonderland.

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