i don't know all of them 同义句要以i ____ know ____ of them 的形式改.......

i don't know all of them 同义句要以i ____ know ____ of them 的形式改.......
i don't know all of them 同义句
要以i ____ know ____ of them 的形式改.......

i don't know all of them 同义句要以i ____ know ____ of them 的形式改.......
I only know some of them

I know nothing of them all.