单项选择题
A．congratulations B．condolences C．best wishes D．all of the above
A．the number of the expulsions is not large B．the number of the expulsion is wrong C．there are soldiers hiding among the students D．guns are out of control in US schools
A．they are aged B．they find it hard to accept modern things C．they take their standards of perfection from the Greek D．they look at things by the standards of the past