Question

................ people attended the meeting. (Fill in the blank with a suitable Determiner​

Answer 1

All people attended the meeting. ('All' is a determiner.)

What is a determiner is English grammar?

• A determiner is a word that is used to modify a noun or equivalents of a noun to specify its quantity.
• These words precede the nouns to make it clear what they refer to.
• Example:

         1- All nations want to be independent.

        2- Some girls were listening to the music.