_frightened us_two lights appeared suddenly in the darkness A it was :that B what;most was that能否这样理解it 是形式主语 真正的主语是two lights appeared suddenly in the darkness,所以是这件事情是我们感到害怕,故选A .,

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 12:43:44
_frightened us_two lights appeared suddenly in the darkness A it was :that B what;most was that能否这样理解it 是形式主语 真正的主语是two lights appeared suddenly in the darkness,所以是这件事情是我们感到害怕,故选A .,

_frightened us_two lights appeared suddenly in the darkness A it was :that B what;most was that能否这样理解it 是形式主语 真正的主语是two lights appeared suddenly in the darkness,所以是这件事情是我们感到害怕,故选A .,
_frightened us_two lights appeared suddenly in the darkness A it was :that B what;most was that
能否这样理解it 是形式主语 真正的主语是two lights appeared suddenly in the darkness
,所以是这件事情是我们感到害怕,故选A .,无法理解.

_frightened us_two lights appeared suddenly in the darkness A it was :that B what;most was that能否这样理解it 是形式主语 真正的主语是two lights appeared suddenly in the darkness,所以是这件事情是我们感到害怕,故选A .,
你理解的不恰当.如果选A.,则frighten这个动词的用法就不对了,它是一个及物动词,那么was frightened 就是被动语态了.所以第一个横线只用it 第二个横线用THAT 就对了
What frightened us most是一个主语从句,what 又同时作从句中的主语,
第二个横线用was that,则that 引导一个表语从句.that不作成分,但不能省略.

我觉得A B都可以
B的话意思是最让我们害怕的是，，

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