填空题

If you want to have strong bones you should eat food ______ .

【参考答案】

rich in calcium

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填空题

Fruits, such as watermelon, red grapefruit, and guava, are now exciting the interest of researchers because ______ .

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A study shows that men who eat tomato products twice a week could probably avoid developing prostate cancer by one third in comparison with those ______ .