Переведи карточку

Привет! Давай решим, какие предлоги использовать в предложениях. Вот как можно заполнить пропуски:

1. a) This information is available to anyone.
   b) Are you available for a meeting tomorrow?
2. They were aware of the difficulties that might occur.
3. The citizens of the town contributed clothing to the flood victims.
4. Did you benefit from your holidays?
5. I hope I'll have the opportunity of seeing you often.
6. Charles Darwin was contemporary with Karl Marx.
7. Some insects are beneficial to plants.
8. The 20th century witnessed a lot of outstanding achievements in science.

Если что-то непонятно или нужно объяснить подробнее, дай знать!