I really don,t know which one to buy.改为同义句.I really don,t know which one ___ ___ ___.

I really don,t know which one to buy.改为同义句.I really don,t know which one ___ ___ ___.
I really don,t know which one to buy.改为同义句.I really don,t know which one ___ ___ ___.

I really don,t know which one to buy.改为同义句.I really don,t know which one ___ ___ ___.
I should buy

i will buy