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