Question

After pulling out of the station, the train began to ________.

1. A.
   pick up
2. B.
   speed up
3. C.
   come up
4. D.
   run up

Answer 1

B
题意：驶出车站后，火车开始加速。speed up可表示“加速”。若选A项，应是pick up speed（加快速度）。