单项选择题

Why are subterranean buildings good for energy conservation

A．Because they use solar energy.
B．Because they don't need central heating.
C．Because the temperature there remains constant.
D．Because they don't need air-conditioning.
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单项选择题
Another advantage in building down rather than up is that ______.
A．surface constructions then can be more aesthetically planned
B．historic landmarks then can be better preserved.
C．there won't be skyscrapers blocking our view.
D．there will be more green land left untouched.
单项选择题
According to Bennett's forecast of the .coming revolution in building design, ______.
A．future buildings will have only 20 ~,6 of their structure above the ground.
B．more future buildings will go subterranean than they do today.
C．only constructions of historic interest will remain above the ground.
D．subterranean structures will all go 110 feet into the earth.
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