I have finished translating a large part of the book, but the rest ___ more difficult.

A．is

B．are

C．was

D．were

肾细胞癌中，预后相对好的组织类型是（）

A.透明细胞癌

B.颗粒细胞癌

C.嫌色细胞癌

D.肉瘤样肾细胞癌

E. * * 状肾细胞癌