G. Interrogative Determiner is a word used in questions, such as how, which, or what.
G1. We use 'which' as a determiner to ask a question about a specific group of people or things. (e.g. Which restaurant did you go to? Which countries in South America have you visited?)
G2. When we are asking a general question we use 'what' as a determiner. (e.g. What films do you like? What university did you go to?)
Today's Idiom:
don't give up the day job: not very good at doing something and is not likely ever to be successful at doing it.
Example: What did you think of my thinking? Wom, don't give up the day job!