单项选择题

The word "obesity" (Line 2, Para. 1 ) most probably means ______.

A．lack of nutrition
B．becoming too fat
C．abundance in calories
D．shortening of life span
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单项选择题
The reason why corn can be processed into other food additives is that ______.
A．it can serve as sweeteners during cooking
B．it contains an unparalleled amount of starch
C．its basic organic molecules can be broken down
D．its chemical composition can be changed and reorganized
单项选择题
Overproduced corn in American farms has been converted to ______.
A．feed cattle, pigs and poultry
B．manufacture automobile components
C．make artificial beef, pork, and chicken
D．become high-fructose low fat products
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