1.   The dignitaries, as usual, waited for him to go first.

2.   The toss of a coin Decided who would go first.

3.   They tossed a coin to Decide who would go first.

4.   We drew lots to decide who should go first.

5.   We drew lots to see who would go first.

6.   We flipped a coin to see who would go first.

7.   When whales eat contaminated prey, organochlorines go first to the digestive system, and are then deposited in fatty tissues.

8.   You go first.

9.   Tradition dictates that the youngest member should go first.

10.   Oh hang on a minute, the secretary can go first.