问题
选择题
Without the air to hold some of the sun’s heat,the earth at night .
A．would be freezing cold
B．will be freezing coldly
C．would be frozen cold
D．can freeze coldly
答案
答案：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。