The solution for exercise 2 (9.4) in chapter Grammar time 9 of Wider World 4 - Student's Book by Suzanne Gaynor, Kathryn Alevizos and Carolyn Barraclough
Question
In pairs, write one or two indirect questions for each situation.
Answer
I was wondering when dinner will be ready. / Could you tell me what time dinner will be ready, please?
I'd like to know what this food is.
Do you have any idea what time the parade finishes?
Could you tell me if it is the custom to make a toast?