Употребите инфинитив или герундий.

1. If the arrest is made as a result of (to observe, observing) a law violations, an investigation is conducted to determine whether or not a crime was committed.
2. Mobility has given people the opportunity (to commit, committing) crimes far away from home.
3. I suggest (to see, seeing) this film.
4. I couldn’t help (to smile, smiling).