Officials believe that more than one person for the big fire.A. is to be blamedB. should

问题补充：

Officials believe that more than one person for the big fire.

A. is to be blamed

B. should blame

C. should be blaming

D. is to blame

答案：

A. is to be blamed

B. should blame

C. should be blaming

(答案→)D. is to blame

解析：考查主谓一致。more than one +单数的可数名词，不止一个，谓语动词应用单数形式，短语：应受责怪be to blame，句意：官员们认为不止一个人因为大火应受责怪。所以选D。