Exploring Writing 2nd Edition by John Langan

Exercise 18

Correct each run-on with either (1) a period and a capital letter or (2) a comma (if needed) and the joining word and, but, for, or so. Do not use the same method of correction for every sentence.
Some of the run-ons are fused sentences (there is no punctuation between the two complete thoughts), and some are comma splices (there is only a comma between the two complete thoughts). One sentence is correct.
1. Our boss expects us to work four hours without a break, he wanders off to a vending machine at least once an hour.
2. The children in the next car were making faces at other drivers, when I made a face back, they giggled and sank out of sight.
3. Chuck bent over and lifted the heavy tray then he heard an ominous crack in his back.
4. The branches of the tree were bare they made a dark feathery pattern against the orange-pink sunset.
5. In the dark alley, the air smelled like rotten garbage a large rat crept in the shadows.
6. Our class wanted to do something for the hurricane victims, we sent a donation to the Red Cross.
7. My ex-husband hit me just once in our marriage five minutes later I was packed and walking out the door.
8. Aunt Jeanne thought a warm dry climate would improve her health she moved to Arizona.
9. The average American teenager spends thirty-eight hours a week on schoolwork the average Japanese teenager spends about sixty.
10. We stocked our backpacks with energy bars, and we also brought bags of dried apricots and peaches.