With a lot of difficult problems , the manager felt worried all the time.
A. settled
B. to be settled
C. settling
D. to settle
网友回答
A. settled
B. to be settled
C. settling
(答案→)D. to settle
解析： D 本题考查with复合结构。经理一直忧心忡忡，是由于有很多困难要解决，因此用不定式表示要解决；又因句中解决困难的人是经理，因此要用主动形式。