I really don't know which pair to choose同义句

I really don't know which pair to choose同义句
I really don't know which pair to choose同义句

I really don't know which pair to choose同义句
保证准确：
= I really don't know which pair I should choose.
= I really have no idea which pair to choose.
= I really have no idea which pair I should choose.
我真的不知道该选择哪一双.

I really don't know which side I should choose.
I have no idea which pair to choose.