单项选择题
A.a;the B.the;a C.the;the D.a;a
A.whose parents are clever B.often left alone with nothing to do C.born with a good mind D.often guided by his parents to play and think
A.to praise and encourage their children more often B.to be hard on their children C.to leave their children alone with nothing to do D.to give their children as much help as possible