The parents have devoted themselves to bringing up their children and now it is time for the children, ______, to show their devotion to their parents.  [ ]

A. in their turn    

B. in their return  

C. in return  

D. in their turns

全蝎与蜈蚣均可治疗

A．急慢惊风，癫痫抽搐，破伤风

B．中风面瘫，半身不遂

C．疮疡肿毒，瘰疬结核

D．偏正头痛，风湿顽痹

E．吐血，衄血，崩漏