A：At what age do children start school in your country?
B：At five.
A：Do boys and girls go to school together?
B：Yes,they do.
A：Do you think this is a good idea?
B：Yes,I do.
A：Do some children go on to university?
B：Yes,they do.
A：What examinations do they take first?
B：O levels and A levels.
A：How long do you usually stay at university?
B：Three or four years.