题目内容：

（ ）no air or water,there would be no life in the world
______ no air or water,there would be no life in the world.
a.Were there b.There are c.There was d.Is there
答案给的是A,为什么啊 别的选项不可以吗

优质解答

这是虚拟语气的倒装句.原句为：
If there were no air or water,there would be no life in the world.