But for the accident of nuclear power station in Japan, the world ____________(不会意识到) the importance of nuclear safety. (aware)
KEY: wouldn’t be/have become aware of
为什么一个是BE 一个是BECOME
这是虚拟语气的句子。用wouldn't be aware表示和现在的状态相反的假设.而wouldn't have become aware of 表示和过去发生的动作become aware of相反的动作。两个都对,因为第一个表示现在世人是意识到核安全的重要性的。而第二个表示become aware 是过去发生的动作。希望能帮到你。