Помогите пожалуйста) И 5, 6,7 тоже исправьте:D

3. Brazilia have been the capital of Brazil since 1960. Before 1960, Rio de Janeiro was the capital.
4. Carol moved to Oxford in 1975. She has lived in Oxford since 1975
5 I haven't seen the new manager yet. When did she start working in the company?
6 you spoke good French on the telephone yesterday. How long have you learnt it?
7 Paula and Laurence have been married since last year. They met at university.
8 Peter have never tried Japanese food . He went Japan last year but he didn't eat hamburgers.
9 I broke my arm six month ago. I have used a computer for my work since then.
10 my brother has been a professional footballer since 1994. But when he was younger he..