As you can see，the number of cars on our roads rising these days.
A. was keeping
B. keep
C. keeps
D. were keeping
网友回答
A. was keeping
B. keep
(答案→)C. keeps
D. were keeping
解析：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。