（）是要求被担保人向担保人提供一份担保。
A.保证
B.抵押
C.质押
D.反担保
参考答案：D
Don't handle the vase as if it ________ made of steel.(2012·北京)
A．is
B．were
C．has been
D．had been
In relation to company law, describe the characteristics of preference shares. (10 marks)
