问题
选择题
Without the air to hold some of the sun’s heat, the earth at night_____very cold, too cold for us to live.
A．will be
B．would have been
C．is
D．would be
答案
答案：D
考查虚拟语气。本题考查与现在事实相反的虚拟语气，故用would + v原形。句意：:(如果)没有大气保存太阳部分的热量,地球的晚上也会刺骨的寒冷,冷得对我们来说无法居住。
