12. —It is reported in the local newspaper that the murderer was caught in a small town.

—__________.

A．Justice has long arms

B．One false move may lose the game

C．Lies have short legs

D．Kings go mad, and the people suffer from it

方某向孙某借款1万元，孙某要求其提供担保，方某与孙某签订质押合同，约定将其价值1.5万的电脑出质给孙某，下列说法正确的是( )。

A．方某和孙某之间的质押合同自电脑交付给孙某之后生效

B．如果孙某将电脑返还给方某，则孙某不再就该电脑享有质权

C．如果孙某向其他人借款，经方某同意可以以电脑的实际价值设置质权

D．如果方某到期没有清偿债务，则孙某可以根据约定变卖电脑，取得所卖电脑的全部价款