What form can i use this word popular in the sentence is brand of school bag our school?

Please provide the word you want to use in the sentence "is brand of school bag our school?".

For example, you could ask:

"What form can I use the word 'most' in the sentence 'is brand of school bag our school'?"

Once you provide the word, I can help you figure out the correct way to use it in the sentence.