肝内胆管积气的常见原因为（）
A.肝肠吻合术
B.奥狄括约肌切开术
C.消化道溃疡
D.恶性肿瘤侵蚀
E.肾结石
参考答案：A, B
I would rather ________ the chance than ________ you.
A. not to take; to hurt B. not taking; hurting
C. not take; hurt D don’t take; to hurt
马克思主义观点认为，教育起源于______。
