. ______ was done by the girl students.

A．One three of the work

B．One third of the works

C．Two third of the works

D．Two thirds of the work

甲状腺未分化癌的最佳治疗方案是（）。

A.手术+甲状腺干制剂

B.手术+外放射治疗

C.手术+¹³¹Ⅰ同位素治疗

D.手术

E.手术+化疗