the reason for his failure is that he lacked capital at that time 这句话中的that 可以换...
问题描述：
the reason for his failure is that he lacked capital at that time 这句话中的that 可以换...
the reason for his failure is that he lacked capital at that time
这句话中的that 可以换成 what或者 because that 为什么
what 怎么用呢？
答
the reason for his failure is that he lacked capital at that time
A is B
A是B 两个就是一个东西
不能用because（because 表原因）
what 要在从句中作句子成分,但是从句不缺成分,不能用what