_______ in London for so many years, you must learned a lot about English culture. [ ]

A. to live        

B. To have lived        

C. Having lived      

D. Living

初步社会评价主要是分析现有资料和现有状况，着眼于( )的分析判断，一般以定性描述和分析为主。

A．正面社会因素

B．负面社会因素

C．全面社会因素

D．宏观社会因素