You should________a  letter __________ him.        [ ]

A. write ; to                                  

B. write ; for        

C. wrote ; to                                  

D. wrote ; for

急性爆发性溃疡性结肠炎最常见的并发症是（）。

A.腹腔内脓肿

B.肠穿孔

C.癌变

D.肠梗阻

E.中毒性巨结肠