单项选择题
A．are left-handed B．are right-handed C．can use both hands equally well D．never use left hands
A．all the people are right-handed B．life is hard fbr left-handed people C．left-handed people can't live D．there is another left-handed world
A．are left-handed B．can use both hands equally well C．are right-handed D．like to use one hand more than the other