comma,slices,ect...

1. Some radio stations have powerful signals, they can be heard in nearby cities.
Some radio stations have powerful signals; they can be heard in nearby cities.

2. One disc jockey reads letters, he also jokes with callers.
One disc jockey reads letters, and he also jokes with callers.

3. Several stations hold contests, prizes are often albums.
Several stations hold contesest, and prizes are often albums.

4. Tanya won one contest, she named a song correctly.
Tanya won the contest; she named a song correctly.

5. The sound system is complex, few people could operate it.
The sound system is complex, and few people could operate it.

6. The Reds won the pennant they will play in the World Series.
The Reds won the pennant, and they will play in the World Series.

7. Last summer we camped, it was the best vacation ever.
Last summer we camped, and it was the best vacation ever.

8. Tony has a set of barbells, he lifts weights every day.
Tony has a set of barbells, so he liftes weights every day.

9. We saw an old Hitchcock film, it was a classic thriller.
We saw an old Hitchcook film, and it was a classic thriller

10. A raccoon visits our back porch every evening, we call him the Lone Ranger.
A raccoon visits our back porch every evening, so we call him the Lone Ranger.