刺激B细胞杂交瘤细胞增殖最常用的细胞因子是（）

A.IFN-α、TNF-α

B.TNF-α

C.IL-2、IFN-，γ、TNF-α

D.IL-6

E.IL-6、IL-1

------Look，it’s the most beautiful park___________ I’ve ever visited before.

-----Really？How I wish to go to see it for myself!.

A．that

B．which

C．whom

D．who