Colds ____ by viruses. Acne is a condition that ____ the skin to produce too much oil. Research has failed to ____ any connection between eating fatty foods and acne. Caffeine ____ to people having some health problems. You can buy foods that ____ as being low in cholesterol. Cholesterol ____ naturally by the body. Some doctors ____ the fact that there's a link between cholesterol levels and heart diseases. Local people don't want this factory to ____. Local people don't want this factory to be built because they believe that their houses ____. A lot of money ____ on that research.

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