I don't know ____if he can't do it.A what B when C where D how

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I don't know ____if he can't do it.A what B when C where D how

I don't know ____if he can't do it.A what B when C where D how
I don't know ____if he can't do it.
A what B when C where D how

I don't know ____if he can't do it.A what B when C where D how
选A
what if 倘使...将会怎样,即使...又有什么要紧
本句的意思是:我不知道如果他做不了我将会怎样.

A
what if固定表达法.这句话的意思是“我不知道如果他不会做我该怎么办。”

D
如果他不会做，我也不知道该怎么做。

I don't know ____if he can't do it.A what B when C where D how I don't know. “i don't know you know i don't know sorry,I don't know. i don`t know much I don't really know. 英语；I don't know I don't know miss I don't know him. I don't know now 翻译 i don't know So know,I don't I don't know her i don't know anything I know enough to know that I don't know i don't know what i I don't think I know you I don’t no I don't know