—How was your weekend?

—We ______ great fun playing in the park. 　 [ ]

A. have

B. were

C. had

D. has

哪个不是肾前性急性肾衰竭的诱因（）

A.大量利尿

B.心衰

C.大量失血

D.双侧输尿管结石

E.脱水