题目

Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.Shampoo—do we really need to use it?Buying shampoo can be overwhelming—there are so many brands to choose from, across a huge range of prices. Some brands promise to repair and nourish our hair,  others promise to strengthen and add volume. But is any of these claims true? Do we even need shampoo at all?Since long before shampoo   (invent)—some say in India—our bodies have been producing sebum, an oil-like substance. Sebum stops our skin   (get) dry, manages the health of our scalp and makes our hair shiny. But it also collects dirt, and, if (leave) untouched for too long, sebum can cause our hair to become greasy. There are no disadvantages from a health perspective to letting our hair be greasy, says Eleanore Richardson, Trichologist at Fulham Scalp and Hair Clinic, but many people choose to wash their hair a regular basis for aesthetic reasons.And so we reach for the shampoo bottle. Shampoos contain a group of chemicals called surfactants. They grab the dirt and grease from the surface of our hair, meaning when we rinse away the shampoo, we also wash away the grease and dirt. But, Laura Waters, a professor of Pharmaceutical Analysis, points out, "some surfactants work too well" and take the natural oils out of the hair, as well. Though more expensive shampoos may contain (harsh) surfactants, the type of shampoo doesn't really matter. "It's on our hair very briefly and gets washed away". It's the conditioners and styling products that we use after the shampoo that make a bigger difference to the texture and feel of our hair.Naturally, the more we put onto our hair, the more we need to cleanse it off, (create) a vicious circle. So, yes, it seems we do have a need for shampoo, but we also shouldn't expect it (serve) as a miracle cure. And, finally, next time you're in a shampoo aisle, remember that hair is made up of dead protein cells and that, sadly, not even the most expensive shampoo bring them back to life. See to it that you make better decisions. 答案：【1】while【2】was invented【3】getting【4】left【5】on【6】as【7】less harsh【8】creating【9】to serve【10】can

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