It is human activities on the earth that are to global warming.A. be blamed forB. blame fo

问题补充：

It is human activities on the earth that are to global warming.

A. be blamed for

B. blame for

C. take charge of

D. be responsible with

答案：

A. be blamed for

(答案→)B. blame for

C. take charge of

D. be responsible with

解析：考查固定结构。Be to blame for应受责备，为……负责。所以选B。