With a lot of difficult problems , the manager felt a heavy burden taken off his mind.
A. settled
B. to be settled
C. settling
D. to settle
网友回答
(答案→)A. settled
B. to be settled
C. settling
D. to settle
解析：本题修饰名词problems是动词settle，表示被解决的问题，表示被动的意思，用过去分词修饰名词作定语，settle的过去分词是settled，故本题选A。