1 . Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need.

A. backed   B. benefit   C. consumption   D. diversity   E. disordered   F. matter G. perceive   H. led   I. snacking   J. treat   K. wandering

Walking past a corner bakery, you may find yourself drawn in by the fresh smell of sweets wafting from the front door. You're not alone. The knowledge that humans make decisions based on their nose has     1     major brands like Cinnabon and Panera Bread to use the scents of baked goods in their restaurants, leading to big increases in sales.

But according to a new study, the food you ate just before your walk past the bakery may impact your chance of stopping in for a sweet     2    —and not just because you're full. Scientists at Northwestern University found that people became less sensitive to food odors (气味) based on the meal they had eaten just before. So, if you were     3     on baked goods from a coworker before your walk, for example, you may be less likely to stop into that sweet-smelling bakery.

The study found that participants who had just eaten a meal of either cinnamon buns (肉桂面包) or pizza were less likely to     4     "meal-matched" odors, but not non-matched odors. The findings were then     5     by brain scans that showed brain activity in parts of the brain that process odors was altered in a similar way. These findings show that just as smell regulates what we eat, what we eat—in turn—regulates our sense of smell.

Feedback between food intake and the olfactory (嗅觉的) system may have an evolutionary     6    , said senior and corresponding study author Thorsten Kahnt, an assistant professor at Northwestern University Feinberg School of Medicine. "If you think about our ancestors     7     around the forest trying to find food, they find and eat berries and then aren't as sensitive to the smell of berries anymore, "Kahnt said. So it could theoretically help facilitate (促进)     8     in food and nutrient intake.

While we may not notice the hunter-gatherer adaptation having an effect on our day-to-day decision-making, the connection between our nose, what we seek out and what we can detect with our nose may still     9    . If the nose isn't working right, for example, the feedback may be disrupted, leading to problems with     10     eating and obesity. There may even be links to disrupted sleep, another tie to the olfactory system the Kahnt lab is researching.