He________live in the south, so it is hard for him to________the climate here.[ ]

A. was used to; be used to  

B. used to; used to

C. was used to; get used to  

D. used to; get used to

分封制在周初和周后期的结果截然不同，导致这种现象的根本原因是（）

A.周王室衰微

B.生产力的发展

C.诸侯争权夺利

D.生产关系的变化