题目

       Having drunk too much, Alfred was now driving his car along the country road at the top speed, when an old man walked across the road. Unluckily, the car ran into him and Alfred was filled with fear. But after looking around and thinking there was not a single person who saw the accident, Alfred drove away without picking up the old man to the hospital. The old man was not a fool. He looked up and kept Alfred’s car number in mind. About one month later, they both went to the court. Alfred’s lawyer said, “Alfred is an experienced driver of more than twenty years.”    “IA fantastic idea occurred to him ________ he could use a plastic bottle, ________ cut off, as a container to grow young plants in.A．which; whose topB．that; the top of whichC．that; with its topD．whether; whose top