— What did you do yesterday?

— We had great fun            in the park. [ ]

A. plays

B. played

C. playing

D. to play

属于抗代谢类药物的化学药物是（）

A.环磷酰胺

B.氟尿嘧啶

C.丝裂霉素

D.多柔比星

E.长春新碱