There are seasons in a year.[ ]
A. twelve
B. four
C. five
答案：B
________ made his family disappointed.[ ]
A. He not being chosen
B. His not having been chosen
C. Him not being chosen
D. He was not chosen
胃次全切除术后数个月或数年多发生的并发症为（）
A.腹泻
B.碱性反流性胃炎
C.出血
D.穿孔
E.吻合口溃疡
