质押合同自( )生效。
A．质权人取得质物所有权时
B．质物脱离所有权人控制时
C．质物移交与质权人占有时
D．出质人交付质物时
参考答案：C
He spends as much time as he can ______ English every day. [ ]
A. to practise speaking
B. to practise to speak
C. practise to speak
D. practising speaking
目前仍在探索的腹腔镜手术不包括（）
A.Whipple手术
B.胃切除术
C.解剖性肝切除术
D.门静脉断流术
E.门静脉转流术
