These serious activities were interrupted by a lively jumping dance.

Therefore, correcting the small problems prevents more serious criminal activity.

Here in Vojvodina, fun, food and drink are indispensable to any serious activity.

Someone was smartly using them as a pawn to cover up for other more serious activities.

When members reach their twenties they usually grow out of gang membership, but some move on to more serious criminal activity.

They said the group had engaged in little serious political activity.

They say younger children are becoming involved more often in serious criminal activity usually associated with older youths or adults.

The astronauts also engaged in less serious activities on the Moon.

"But surely there is not be serious partisan activity this far behind the front line," Ernst said, knowing better.

We don't know of any serious activity up here.