Match the words (1-6) with the definitions (A-F).

1. gauge -
2. preservative -
3. secure -
4. space -
5. softwood -
6. sleeper -

A. to hold something in place
B. a plank that braces and supports a railroad track
C. lumber from a conifer tree
D. the distance between two rails on a track
E. to designate the distance between items
F. a substance that protects wood sleepers