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  3. Including a few bites of meat in the diets of poor children from developing countries improves both their health and their perfo

Including a few bites of meat in the diets of poor children from developing countries improves both their health and their perfo

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问题     Including a few bites of meat in the diets of poor children from developing countries improves both their health and their performance in mental tests, according to reports presented at this year’s annual meeting of the American Association for the Advancement of Science.
    In one study from rural Kenya,【C1】______found that children who ate【C2】______ounces of meat every day, along with their lunch of corn and beans,【C3】______better in problem-solving tests【C4】______children given supplements of milk or vegetable oil. This small【C5】______of meat gave children all their daily needs【C6】______vitamin B12, 68 percent of all they needed of zinc, and 26 percent of their daily iron【C7】______, the researchers noted.
    Dr. Howarth Bouis of the International Food Policy Research Institute in Washington D. C, told Reuters Health that research【C8】______children who don’t get enough iron, zinc and other【C9】______have a weakened immune system,【C10】______growth and cognitive impairments. And when entire generations of children aren’t getting enough nutrients,【C11】______can have implications nationwide, Bouis added.【C12】______, the World Bank estimates that micronutrient deficiencies【C13】______South Asia 5 percent of its GDP each year, he said. "When you can’t work【C14】______hard, you can’t think as well. It【C15】______from economic development, " Bouis said.
    He added that children in【C16】______countries don’t get enough nutrients【C17】______they can’t afford them, so it’s up to the government to【C18】______. For instance, the government could【C19】______programs that increase production of nutrient-rich foods, which【C20】______down the price, Bouis suggested.
【C2】
选项 A、ordinary
B、common
C、plain
D、usual
答案D
解析 空格处填的词是来修饰吃肉的量。分析四个选项：[A]ordinary“平常的，普通的，常见的”；[B]common“平常的，普通的，平凡的”一般用于指通常的、常发生的、广泛使用或众所周知的事；[C]plain“普通的，平凡的”多指地位或身份普普通通或事物很简单，不复杂；[D]usual“惯例的，通常的．平常的”，强调与平常的习惯和程序相一致，经常性的动作。文中所指的吃肉的量应该是在通常情况下所吃的量，因此选[D]usual。
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