题目

下列各组性状互为相对性状的是（ ）A． 绵羊的白毛和黑毛 B． 家鸡的长腿和毛腿C． 玉米的黄粒和圆粒 D． 豌豆的高茎和豆荚绿色 答案：ANow that you’re grown up，you’d better spend your time just on the things you find_______.A．worth doing them　　　B．worth being doneC．worthy of doing them　　D．worthy of being done