Choose the suitable question word to complete each short conversation.

Choose the correct option.

"[Whose|What|Which] pencil case is this?" — "It's Fred's."

"[When|Where|Why] are you reading this book?" — "I love adventure stories!"

"[Whom|Why|How] would you invite to the picnic?" — "Jack and Rose."

"[Why|Which|When] T-shirt do you like more?" — "The black one."