army without paying for it.

　　Taxes, therefore, cannot be avoided.

　　(12)(6 min.)

　　Why are Americans getting fatter?

　　New research announced Monday found that

　　1. __________ human stem cells were exposed to a common virus, they turned into fat cells. They didn't just change, they stored fat,

　　2. __________.

　　While this may be reasonable for putting on weight, it doesn't explain 3. __________

　　or even most to America's growing obesity problem. But it adds to other recent evidence that blames huge waistlines on

　　4. __________ than just super­sized appetites and underused muscles.

　　For several years, researchers have looked at a possible link between obesity and this common virus from a family of viruses that cause colds and pinkeye

　　5. __________ people. They had already found that

　　6. __________ higher percentage of fat people had been infected with the virus

　　7. __________

　　nonfat people. They had exposed animals to the virus and got

　　8. __________

　　to fatten up and even found a gene in the virus that caused animals to get fat.

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