Question

【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

Answer 1

【答案】C

【解析】

试题句意：正如你能看见的，道路上汽车的数量这些天一直在增长。keep doing一直做，the number of …的数量，做主语谓语用单数。故选C。