Придумать 10 предложений с вопросительными вопросами 1)haw many, 2) haw much, 3) when, 4) which?

How many chocolates do you buy?
How many people do you remember?
How many times do you go to the gym?
How much does it cost?
How much do you think about it?
When it was?
When did you meet him?
Which is your exercise book?
Which is your favorite song?