A) They cost little to make. B) They helped keep teeth clean. C) They weren't very hygienic. D) They were extremely innovative.
A) the stem of a toothbrush B) a special toothbrush C) an animal hair used to make a brush D) a part of a hog
A) true B) false
A) because people chewed on them to help clean the teeth B) because they tasted better when chewed C) because they were chewed on by animals D) because people chewed them after using them
A) It was cheaper than previous toothbrushes. B) It worked better than any toothbrush before it. C) It originally used animal hairs. D) It was vry popular when it was invented.
A) Sew it into specific brands of clothing. B) Test it on mosquitoes. C) Give it away to a variety of stores. D) Manufacture it in factories.
A) To emphasize the importance of repellants. B) To show readers why mosquitoes are annoying. C) To indicate most people probably knew this fact already. D) To highlight the need for an improved product.
A) The ingredients in standard bug repellants B) the way the patch has been tested with the public C) the type of chemical used in the patch D) the reason why mosquitoes bite people
A) Mosquitoes are Pesky B) Carbon Dioxide: Perfume of the Mosquito C) A Safe Solution to Pesky Mosquitoes D) Avoid Chemicals in Common Repellants
A) true B) false |