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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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