English Skills with Readings 7th Edition by John Langan

Exercise 111

Locate the split in each of the following run-ons. Each is a fused sentence -that is, each consists of two sentences that are fused, or joined together, with no punctuation between them. Reading each fused sentence aloud will help you "hear" where a major break or split in the thought occurs. At such a point, your voice will probably drop and pause.
Correct the run-on by putting a period at the end of the first thought and a capital letter at the start of the next thought.
EXAMPLE
Martha Grencher shuffled around the apartment in her slippers.
husband couldn't stand their slapping sound on the floor.
1. A felt-tip pen is easy to ruin just leave it lying around without its cap.
2. Phil cringed at the sound of the dentist's drill it buzzed like a fifty-pound mosquito.
3. Last summer no one swam in the lake a little boy had dropped his pet piranhas into the water.
4. A horse's teeth never stop growing they will eventually grow outside the horse's mouth.
5. Sue's doctor told her he was an astrology nut she did not feel good about learning that.
6. Ice water is the best remedy for a burn using butter is like adding fat to a flame.
7. In the apartment the air was so dry that her skin felt parched the heat was up to eighty degrees.
8. Thousands of people are waiting for organ transplants my sister is one of them.
9. Lobsters are cannibalistic this is one reason they are hard to raise in captivity.
10. Last week a student brought a gun to school the principal has now decided to install metal detectors at the school's entrance.