In many parts of the world, flowers of all colors and shapes can be seen in gardens, parks and other green spaces in Spring. They make our world look and smell better. So, it is no surprise that people love flowers! Well....except for one. Dandelions(蒲公英)! In the United States, they are considered "weeds ", the name for any unwanted plant. In an effort to have the perfect green grass lawn, people try their best to kill all dandelions with chemical produets. Or they dig them out at the roots. But dandelions are hard to kill. And that is a good thing because they are actually one of the most nutritious foods in the world The most hated flower on earth is one of the healthiest to eat! A 2014 study ranks dandelion greens as one of the top 41 most nutritious foods. Dandelions are a great source of vitamin(维生素) K and also are a good source of vitamins A and C. They also have vitamin E,folate and small amounts of other B vitamins. Also, they provide lots of iron. calcium,magnesium and potassium. Here is another reason to love dandelions. Children in many parts of the world have had the simple pleasure of blowing the soft, white dandelion tops. They watch the seeds float easily in the air. In fact, there is a game children play with dandelions that have gone to seed.Pick the white top, make a wish, close your eyes and blow! If you blow all of the seeds off in one breath, your wish will come true! Well, that is what many children believe. Even if the wish does not come true, at least the seeds have traveled far and wide, letting more of this nutritious food souree continue to grow. 42.________ are considered weeds in the United States. A. Flowers B. Dandelions C. Vitamin D. Seeds 43. People can kill dandelions by______. A. making a wish B. blowing the seeds off C. picking the white top D. digging them out 44. What kinds of vitamins can dandelions offer people? A. ViItaminsA and B B. Vitamins C and D C. Vitamins D and E D. Vitamins K and F 45. Which of the following is TRUE? A. Dandelions are easy to kill in the park. B. Dandelion contains more than 41 vitamins. C. Children like blowing the soft tops, white dandelion to have fun. D. Dandelion is the most nutritious foods in the world 46. What is the main idea of this passage? A. Dandelions are hard to kill B. Children love dandelions C. The different usages of dandelions. D. Dandelions are full of vitamins.