The building around the corner caught fire last night.The police are now         the matter.[ ]

A.seeing through

B.working out

C.looking into

D.watching over

书刊美术设计的特点之一是（）

A.文化性与商品性相统一

B.外向性与内向性相统一

C.综合性与分散性相统一

D.指导性与计划性相统一