Place commas wherever it is needed
1. jack decided to stay up and watch the movie because it was one he'd always wanted to see.

2. he held the hostage at gunpoint threatened everyone in the bank and backed slowly to the door.

3. bob's job on the board of directors which demands very little of his time is his only work.

4. frightened by the storm the puppy buried itself under its blanket.

5. “students who have short attention spans should avoid night classes” said the professor “because the classes at night are up to three hours long.”