A．Be sympathetic and generous．
B．Be kind and enthusiastic．
C．Be humble, modest and respectful．
D．Be helpful and considerate．
A．To enjoy a better tomorrow．
B．To make good use of time．
C．To improve living skills．
D．To be more experienced．
A．It can exercise your muscles．
B．It can relax body and mind．
C．It can cure some diseases．
D．It can slow your breathing．