1,only a few years time,cars will become a prerequisite for many families.
2,only six years,e-mail has become the most common means of communication.
3,the debate changed the intense,almost a personal attack.
4,it became increasingly obvious that the city's air pollution is becoming more and more serious.
5,we must not allow these temporary problems affect our long-term plans.
6,do you think Dad will let you to take part in the gathering Pat?
7,you should not rest a little bit and not open for more than three hours.
8,thank you very much for the help,if not you,I am not cause this incident.