第二部分：英语知识运用(共两节，满分45分)   
第一节、单项填空(共15小题，每小题1分，满分15分)
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
Is two hours the boy family is poor to come to school on foot?
A．it；that；whose B．it；when；that
C．it for；that it takes；whose D．it；that it takes；whose