Particular attention must be paid welfare, especially in the poor area.
A. develop
B. to develop
C. to developing
D. developing
网友回答
A. develop
B. to develop
(答案→)C. to developing
D. developing
解析：句意：应该特别重视发展人民的福祉，尤其是在贫困地区。句中用到了pay attention to doing sth重视做某事，的固定句型，本句中运用给了被动形式，故选C