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