I relly don't know ( ) about it.I relly don't know ( ) about it. A.what to do B.how to doC.to do what D.how can I do 应该选哪个 并解释一下他们的区别

I relly don't know ( ) about it.I relly don't know ( ) about it. A.what to do B.how to doC.to do what D.how can I do 应该选哪个 并解释一下他们的区别
I relly don't know ( ) about it.
I relly don't know ( ) about it. A.what to do B.how to doC.to do what D.how can I do 应该选哪个 并解释一下他们的区别

I relly don't know ( ) about it.I relly don't know ( ) about it. A.what to do B.how to doC.to do what D.how can I do 应该选哪个 并解释一下他们的区别
答案A.
B项无do的宾语.
C项what 应放在to do前.
D.how 接陈述句语序.即I can

选B

前边应该是really 吧