A．For both of theme only fatigue can promote sleep.
B．For both of them, overeating may promote sleep.
C．For both of them, they wake only to satisfy their bodily needs.
D．For both of them, they need to be completely satisfied to promote sleep.

A．They are sports fans.
B．They are willing to share the housework.
C．They sometimes buy their wiles things like washing machines as presents.
D．They are concerned about their weight.