There is a sign at the train station, reading “Don’t jump off a train when it’s       .”

There is a sign at the train station, reading “Don’t jump off a train when it’s       .”

1. A.
   on move
2. B.
   on a move
3. C.
   on the move
4. D.
   moving

There is a sign at the train station, reading “Don’t jump off a train when it’s        .”

A. on move                   B. on a move          C. on the move            D. moving

There is a sign at the train station, reading “Don’t jump off a train when it’s       .”