单项选择题
A．it is a totally shared experience B．it is considered as the most dangerous C．it does great harm to human relationship D．it may lead to the loss of his sports team
A．computers are very expensive B．computers can do many things C．computers are very good to play with D．computers are very cheap
A．look for his teeth and buy all of them B．arrest the dentist at once C．make all the shops stop selling teeth D．buy all the teeth in all the shops