用括号里所给词的适当形式填空。

      Yesterday morning, I ____________ (get) up early. Because I ____________ (want) to ____________

(go) to fly a kite in the park. But it ____________ (is) raining. So I stayed at home and ____________ (do)

my homework. Today it is sunny. I ____________ (walk) to the park. I fly my kite in the sun. I ____________

(jump) and ____________ (laugh). I have fun today.

易引起出血性膀胱炎的烷化剂是（）

A.塞替派

B.环磷酰胺

C.白消安

D.氮芥

E.卡莫司汀（卡氮芥）