that you didn’t care about this matter at all, I should not have wasted my time explaining it to you.

A．Should I realize

B．Had I realized

C．If I realized

D．Did I realized

选择承泄区是应考虑的条件有哪些？（）

A.承泄区与排水系统布置应尽可能协调

B.承泄区位置应尽可能与涝区中心接近

C.承泄区尽可能选择在水位较低的地方

D.有排泄或容纳大部分涝水的能力