There are many presents.I really don't know _____.

There are many presents.I really don't know _____. there are so many good nevels here,i really don"t know _____ There are many presents.We really don't know____. There are so many interesting books here.I really don't know There are four answer here.I really don't know ( ) . Wow!there are so many presents in the shop;I don't know_____ ou really make me feel sick.You know,I don't know there are Wow!There are so many books in the bookstore; I don't really i really don't know There are so many clothes in the shop that I don’t know ____ There are so many beautiful hats.I don't know ____ there are too many people in the hall .i don't know __ them