I want to know whether it was ______ that caused the failure

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/08 02:45:27

I want to know whether it was ______ that caused the failure of the project.
A his carelessness B he was so careless C because he was so careless D because of his carelessness 为什么是第四个答案是第四个为什么不能是第一个当成强调句为什么不行

A his carelessness
因为被强调部分是原句的主语（名词词组）,不是原因状语
再问：请在详细点解释我不太明白谢谢
再答：还原你就看出来了。【His carelessness主语】 caused the failure of the project 如果你选第四个，你看：【Because of his carelessness 这是介词短语，能做主语吗？！】 caused the failure of the project

I want to know whether it was ______ that caused the failure ——what was it that caused the party to be put off?——（）the i I don't know ______ it was that he moved to another city,but I want to know whether it is polite to eat food with my fing I told the firemen it was my careless cooking that caused th i want to know which test it was for the pictures you sent t It was the engine f that caused the accident I want to know ______ (what)i want to know is (whether) it is worth doing 括号里的为什么这语法：I want to say that although it was not the first time（） I It was ______ what I want to say for myself. 同义句,i want to know whether you will take part in the activit