Помогите пожалуйстаааа)))со вторым заданием

1. Electric power is an important part of the Republic economy.
2. I like to baby-sit with babies when my sister has some business.
3. Sterlitamak is a fast-growing town, more than 250 000 people inhabit it now.
4. A multi-level system of specialist training was introduced in 1990.
5. The University cooperates with famous universities in Germany, France, Belgium, the USA.

people do to save out planet? 4) A you environmentaly friendly or not? буквально пару предложений на каждый вопрос, пожалуйста...)

плиз

Помогите пожалуйста со следующим заданием:

Перепишите следующие предложения; подчеркните в каждом из них глагол сказуемое и определите его временную форму и залог:
1. Scientist have been looking for the substance as a source of energy for many years.
2. Becquerel`s discovery was followed by the intensive research work of Marie and Pierre Curie.
3. New methods of obtaining polymers have been applied at our plant.
4. The lecturer is listened to with great interest.
Заранее спасибо!!

Задание 1. Выберите подходящее слово из двух в тексте о
солнце.

1. The sun looks like a big bright ball/apple.