免疫抑制剂中作为一种烷化剂，其活性代谢产物对迅速增殖的T淋巴细胞发挥细胞毒作用的是（）

A.皮质类固醇

B.硫唑嘌呤

C.环磷酰胺

D.环孢素

E.抗淋巴细胞抗体

—I      downtown to the shopping centre soon. Could I get you something?

—No,  thanks. I will do e-shopping.  [ ]

A. was just going

B. am just about to go

C. have just gone

D. am just going