Great attention must be paidwelfare especially in the poor area.A. developB. to developC.

问题补充：

Great attention must be paidwelfare, especially in the poor area.

A. develop

B. to develop

C. to developing

D. developing

答案：

A. develop

B. to develop

(答案→)C. to developing

D. developing

解析：考查句子结构。本题中含有固定搭配pay attention to sth/doing sth注意sth/做某事；其中的to是介词，后面要接动名词或者名词。本题是这一结构的被动语态的形式；句意：一定要注意人们的福利，尤其是贫穷地区人们的福利。故C正确。