The police are to the traffic accident that we don’t know .A. dealing with; how to deal

问题补充：

The police are to the traffic accident that we don’t know .

A. dealing with; how to deal with

B. deal with; how to deal with

C. deal with; how to do with

D. do with; what to deal with

答案：

A. dealing with; how to deal with

(答案→)B. deal with; how to deal with

C. deal with; how to do with

D. do with; what to deal with

解析：考查短语辨析。be to do sth可以表示安排、计划做某事，排除A，deal不及物，因此deal with与how连用，do with与what连用，what作do的宾语，排除C、D；故选B。