Английский язык

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Подчеркнуть сказуемое главного предложения, определить видовременную форму и залог глагола

1. Some attempts to find the metal in the free state were made ten years ago.
2. It is thought that this land was a tropical zone millions of years ago.
3. A lot has been discovered about journeys of the South Pole.
4. Language helps us to make the best of our life.

правильно ли подчеркнул сказуемые и помогите с формой и залогом