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
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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
单项选择题
During the game, the morale of the athletes is extremely important.
A．strategy
B．luck
C．confidence
D．attitude
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