For years the advice has been clear: Eating five portions a day of fruit and

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问题 For years the advice has been clear: Eating five portions a day of fruit and vegetables is the key to a healthy life. But five may no longer be enough. A study has found that to get【B1】______defense against heart disease, you need to eat at least eight daily【B2】______ of fresh food. The Government’s five-a-day advice has its【B3】______in World Health Organization guidelines to include 14 ounces of vegetables in a daily diet. But there have been doubts over whether eating more than this level of fruit and vegetable meant even greater health【B4】______. Now the new study suggests every extra portion provides added protection.
【B5】______, those in the highest category—eating eight or more a day—have a 22【B6】______lower chance of dying from heart disease than those who【B7】______three portions, the UK average. A "portion"【B8】______just under three ounces, equal to a small banana, a medium apple or a small carrot.【B9】______
Dr. Francesca Crowe of Oxford University is working on the project. She said that although ischaemic (缺血性的) heart disease(IHD)—the most common form—【B10】______.
In spite of these things, the study specifically showed【B11】______, which was those who ate two or fewer portions. [br] 【B8】

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解析语义推断题。空格处所在句子缺谓语，所以空格处应填入动词。根据空格后的three ounces可以推出。空格处所填词和重量有关。所以推测空格处单词具有“称重”之意。结合录音，不难填入weighs。

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