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Without the air to hold some of the sun’s heat,the earth at night   .
A.would be freezing coldB.will be freezing coldly
C.would be frozen coldD.can freeze coldly
A
句中介词短语“Without the air to hold some of the sun’s heat”暗示条件,实际上相当于一个明确的条件状语从句If there were no air to hold....根据句意及句中时间状语today可知句子是对现在情况的假设,所以该句应用与现在事实相反的虚拟语气。
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