Question

All ___ boys were present

​

Answer 1

Answer:

All polite boys were present.

Answer 2

$\huge\red{\underline\orange{\underline\purple{Answer:}}}$Yes. "One of the boys was present" is correct. Take away the phrase "of the boys" and you will see that one was present. (single).Likewise, if you spoke of all of the boys,you would say, "All of the boys were present." Once again remove the phrase " of the boys", and you will see all were present (plural).