fructose every day for a year. A.3 B.4 C.5 D.6 78. Why do older people have deep wrinkles according to the passage? A. They don't drink enough water every day. B. They don't take enough exercise every day. C. Collagen in their body is lost. D. Their daily foods do not contain enough fructose. 79. What can we learn from the passage? A. The fructose-fed rats only showed changes in the collagen of their skin. B. Too much cross-linking makes the skin soft. C. The amount of sugar the rats ate was larger than an ordinary adult might eat ina day. D. It hasn't been shown that taking in high fructose may cause diabetes. 80. The best title for the passage should be" ". A. Sugar — It Could Reduce Collagen B. Collagen — It Could Age You C. Collagen — It Could Cause Wrinkles D. Sugar — It Could Age You
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