1.   A crowd gathered and tension mounted till the riot broke out.

2.   A crowd gathered around to watch the fight.

3.   A crowd gathered to watch the fight.

4.   A crowd gathered to watch the runners, clapping their hands and urging them on.

5.   A crowd had gathered in the corner.

6.   A crowd had gathered, blocking the passage.

7.   A crowd of onlookers gathered at the scene of the accident.

8.   A great crowd had gathered.

9.   A hostile crowd gathered oustide the US embassy.

10.   A huge crowd gathered to hear Mandela speak.