In the evening class most students’’ first language is______.

A．the longer one sleeps, the less sound sleep he gets
B．the more sleep one gets, the more likely a stroke occurs
C．many people stick to about eight hours of sleep to stay fine
D．many people who sleep six hours a night still feel energetic in the day

A．To be older than others.
B．To travel to more countries.
C．To have abundant life experience.
D．To have longer training in interpreting.