单项选择题

Compared with other, traditional building, the amount of air-conditioning needed is ______.

A．very high
B．quite low
C．similar
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单项选择题
A．becameB．becomesC．changed
A．became
B．becomes
C．changed
单项选择题
The gap keeps out ______.
A．heat
B．light
C．air
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