Was it not until you began to work ___ how much time you had wasted?

A．did you realize

B．that you realized

C．did you not realize

D．that you didn’t realize

（五）背景资料：南方某港地处潮汐河口的淤泥质地区，拟在己建码头的侧面扩建三个5万吨级的集装箱泊位，码头为重力式圆筒结构，港区道路及堆场建在吹填砂上。经设计方案比选，对道路及堆场区域的软基采取打排水板真空预压法进行处理。经过招投标，A施工单位承担了港区500万m³的吹填及10万㎡的道路及堆场的施工任务。道路及堆场的典型设计断面如下图所示。

该道路及堆场，工程中应用了何种土工合成材料？其相应的功能是什么？