Question

Вставьте предлоги to или of 
1) to prove ... the professor the necessity.
2) London is the capital .... Great Britain
3) The embankments .... the Neva
4) It`s clear ... me that you
5) He was devoted ... his friend
6) I explained ... the teacher that by the end ... the lesson  i had not finished

Answer 1

1. to, 2. of, 3. of, 4. to, 5. to, 6. to, of