单项选择题

In the United States there are more people who are obese today than twenty years ago.

A．gainfully employed
B．upwardly mobile
C．excessively overweight
D．privately educated
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单项选择题
Concrete is a durable, watertight, and incombustible material that is, moreover, inexpensive to make.
A．in addition
B．more or less
C．however
D．consequently
单项选择题
Because poultry is as nutritious as beef and lower in fat, many people are beginning to include more chicken in the diets.
A．delicious
B．filling
C．common
D．nourishing
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