题目

读“发达地区与欠发达地区的城市人口和城市化水平对比”图，完成依图可知在20世纪70年代中期，世界城市人口A．总数量开始出现下降趋势           B．发达地区所占比重在增加C．欠发达地区所占比重在减少         D．两个地区所占比重基本持平 答案：DOn Sundays there were a lot of children playing in the park, _______ parents sitting together joking. [    ]A. their       B. whose       C. which        D. that