单项选择题

Americans eat _____as they actually need every day.

A．twice as much protein
B．twice protein as much twice
C．twice protein as much
D．protein as twice much
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单项选择题
People who walk on the grass are ______to a fine of $5.
A．possible
B．liable
C．likely
D．reliable
单项选择题
The issue ______at the conference is very important and it will create a sensation nationwide.
A．discussed
B．being discussed
C．is being discussed
D．has been discussed
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