“Little Johnny hated going to see the dentist. It wasn't that his dentist was nasty; it was that Johnny wasn't too fond of sweets. His dentist had warned him that his teeth would fall out if he kept up eating candy. Time and time again, the dentist had told him to cut out sweet food or at least cut down on the amount he ate. As he lay down in the dentist's chair, all the horrible memories from his last visit came back to him. On that occasion, the dentist had to pull out one of his teeth! The pain was terrible - even with the anesthetic the dentist had given him. When the anesthetic wore off it was difficult for him to eat or chew anything at all.
This time the check up was much better. His dentist checked out his teeth, made him wash out his mouth with pink liquid and then told him to spit it out into the sink. That was it. No problems and no pain! Johnny was delighted and so was his dentist. Johnny has finally learned his lesson and was taking better care of his teeth. Well done, Johnny!”

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Read this excerpt from "herd about the flu." the flu shot prevent huge numbers of infections. even when it doesn't fully prevent infection in every person, the shot makes any flu infection less serious. on a global scale, the vaccine can reduce the number of infections only if most people in the community take it. that's because vaccines need to reach enough people to achieve a "herd immunity," the level of immunity needed to prevent the virus from spreading. if too few people get the vaccine, the people who receive it may not be well protected against infection. so the next time you are at the drugstore, and you see no flu shots available, think about the reasons behind it. drug makers are scared to make too many flu shots because they could lose too much money. they then make fewer flu shots and the effect of the flu shots becomes weaker because not enough people take it. people become more reluctant to take the flu shot since they don't think it will fully work. the demand goes down further and the flu companies make even fewer shots the next year. this could continue until the community changes its mind and we all get the flu shot. "that is a community responsibility," says the president of merck, one of the two remaining flu vaccine manufacturers. which argument best supports the passage's claim that more people should get the flu vaccine to stop the virus from spreading? 1.if too few people get the vaccine, the people who receive it may not be well protected against infection 2. so the next time you are at the drugstore, and you see no flu shots available, think about the reasons behind it. 3.people become more reluctant to take the flu shot since they don’t think it will fully work. 4.drug makers are scared to make too many flu shots because they could lose too much money.