题目

As you can see，the number of cars on our roads ________ rising these days. A . was keeping B . keep C . keeps D . were keeping 答案：C甲、乙两人同时从同一起跑线出发，同向做匀速直线运动，某时刻他们的位置如图所示，能正确反映两人运动距离与时间关系的图像是