Great attention must be paid welfare especially in the poor area.A. developB. to develop

问题补充：

Great attention must be paid welfare, especially in the poor area.

A. develop

B. to develop

C. to developing

D. developing

答案：

A. develop

B. to develop

C. to developing

D. developing

解析：考察固定结构的转化。Pay attention to注意…;to是介词，后面应该接动名词，故C正确。句意：我们应该更加注意福利，尤其是贫穷地区。