1.take an active part in sth.
2.at the starting / finishing line
3.on the first lap
4.in front
5.in first place
6.at the same time
7.on the ground
8.the runner from Class 3
9.the Class 3 runner
10.far behind
11.fall behind
12.fall behind sb.
13.run past sb.
14.pass sth. on to sb.