题目

_______a reply, he decided to write again. A. Not receiving B. Receiving not C. Not having received D. Having received not 答案：C8．已知点A是一次函数y=x-4图象上的一点，过点A分别作x轴、y轴的垂线，垂足分别为B，C，且四边形ABOC的面积为3，则满足条件的点A有（　　）A．1B．2C．3D．4