With a lot of difficult problems the manager felt worried all the time.A. settledB. to b

问题补充：

With a lot of difficult problems , the manager felt worried all the time.

A. settled

B. to be settled

C. settling

D. to settle

答案：

A. settled

(答案→)B. to be settled

C. settling

D. to settle

解析：本题考察with+宾语复合结构的用法。用动词不定式to be settled作宾语补足语,表示动作还未发生。经理之所以这么焦急是因为有很多困难要处理。