With a lot of difficult problems_____,the newly-elected manager is having a hard time.

     [ ]

A. settled                        

B. settling

C. to settle                      

D. being settled

早期食管癌病人治疗，首选是（）

A.化学疗法

B.放射疗法

C.激光疗法

D.手术疗法

E.免疫疗法