阅读理解Freshflowersactuallycontinuetogrow

阅读理解 Fresh flowers actually continue to grow while in a vase.So in order to keep flowers fresh, you need to consider what the flowers need to grow and stay healthy.Flowers need water, light, and food.Besides, you need to be aware of a few precautions to take. Distilled water（蒸馏水） is the best kind of water to use for fresh flowers, because there are no chemicals in it.Change the water for your fresh flowers every day or no less than every 2 days to prevent bacteria（细菌） building up.Cut the stems under water again before putting them back in the vase, so that they will be able to draw water up easily. Keep your fresh flowers out of direct sunlight.At night, put them in the fridge.This will prolong their life.Adding commercial flower food to good water is probably the best method of keeping flowers fresh.Some people put sugar in the water for food.That is OK, but commercial flower food has bacteria-killing ingredients, which can make the water more acidic（酸性的）.If you want a more natural food for your fresh flowers, try water that has been specially treated.That solution will also give the water acidity, sugar, and bacteria-killing ability. Keep your fresh flowers away from fruit.Fruit gas, or ethylene, will reduce the life of your fresh flowers, making them get older faster.Ethylene is what makes fruit ripen.It is given off by dead flowers, too, so be sure to remove them. If you follow these tips, your fresh flowers will last a long time and beautify any room in which you put them.1.What does the underlined word precautions in Paragraph 1 mean? A.problems that happen to flowers.B.advantages of having flowers.C.measures taken to prevent problems. D.preparations to grow flowers outside.2.The fact that distilled water is most beneficial for fresh flowers indicates that ______. A.distilled water is perfect for people to drinkB.running water shouldn’t be used to water flowersC.it takes great efforts to keep flowers freshD.fresh flowers aren’t used to certain chemicals3.In order to prolong the life of fresh flowers, you should ______. A.protect them from direct sunlight during the daytimeB.put them in a damp place at nightC.put them in a fridge all the timeD.put them near water during the daytime4.Which of the following is the best method of keeping flowers fresh? A.Cutting the stems under water before putting them back.B.Using distilled water and commercial flower food.C.Keeping them away from fruit gas.D.Watering them with water which contains sugar.

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我明天再问问老师，叫他解释下这个问题