Even though intelligence may be quite (i)_____, and even though scientists may have made frustratingly (ii)_____ progress in understanding it, many experts on intelligence still think that the potential (iii)_____ of the quest to understand intelligence make it worth continuing. For instance, a brain-based understanding of intelligence may help teachers design strategies for educating children more effectively.
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_____ the notion that attention is a limited resource, scientists have found lots of evidence that drivers with cell phones drives slower and are more apt to miss important details than drivers who drive solely on the road.
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The university's once _____ department of economic history has lost prestige and transmogrified into a department of management and marketing.
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