I am quite sure that Mr. Smith will take up his story ___ he stopped yesterday.

A．that

B．in which

C．where

D．on which

血型的分类依据是：（）.

A、红细胞膜上受体类型 

B、红细胞膜上特异性抗原的类型 

C、红细胞膜上特异性抗体的类型 

D、血浆中特异性抗原的类型 

E、血浆中特异性抗体的类型