问题
选择题
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
题目分析：句意：正如你所看到的，路上汽车的数量近来一直在增加。the number表示数字谓语用单数，these days这些日子，表现在。所以选C 。
考点: 考查动词时态的用法。