单选题 If it ______ more humid in the Desert of the Southwest, the hot temperatures would be unbearable.

【正确答案】 D
【答案解析】[注释] 本题为虚拟语气考点。本句是与现在事实相反的假设，条件句与主句相对应，属于if it were…，sth．would　be…句型结构。