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

A. to settle                         B. settling     

C. settled                          D. being settled

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

A. to settle                        B. settling     

C. settled                          D. being settled

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

A. to settle             B. settling      C. settled               D. being settled

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

A. to settle　　　　 B. settling　　 　C. settled　　　　　 D. being settled

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

A. to settle                        B. settling     

C. settled                          D. being settled