Pop Quiz: Choose A or B.

1. A. I can’t believe she wrote a 33-page treatise on how to screw in a light bulb.

1. B. I can’t believe she wrote a 33 page treatise on how to screw in a light bulb.

2. A. I can’t believe she wrote 33-pages on how to screw in a light bulb.

2. B. I can’t believe she wrote 33 pages on how to screw in a light bulb.

3. A. Harold found a 110-year-old book at the flea market.

3. B. Harold found a 110 year old book at the flea market.

4. A. Harold found a book that must have been 110-years-old at the flea market.

4. B. Harold found a book that must have been 110 years old at the flea market.