6. Insert prepositions or post-verbal adverbs.

1. The Englishmen say, "A friend in need is a friend indeed".
2. I can confide in all my friends.
3. Do you know each other for a long time?
4. When we were boys, we went to the country together, played tennis, swam in the river and had fun.
5. Usually a person has only one of three true friends.
6. Are you on good terms with your cousin?
7. As you know, the Earth rotates (вращается) round the Sun.