Now that you’re grown up，you’d better spend your time just on the things you find_______.

A．worth doing them　　　

B．worth being done

C．worthy of doing them　　

D．worthy of being done

游客一般具有双重身份，既是游客又是单体个人的存在，导游员因此应当采用（）两种服务方式。

A.主动与被动

B.热心与消极

C.规范化与个性化

D.全面性与偏见性