7. Whose is this toy box?

Solution:

This question asks about the ownership of a toy box. The available options are e) 'No, it isn't', f) 'Yes, there were.', g) 'Yes, there is.', and h) 'No, there wasn't.'. These options are designed for yes/no questions or questions about existence. 'Whose' questions require a possessive noun or pronoun as an answer (e.g., 'It is John's', 'It is hers'). Since none of the provided options directly answer a 'Whose' question, and they are geared towards 'Is there...' or 'Is it...' questions, it is impossible to select a correct answer from the given choices without further context or a different set of options. If we were forced to choose the 'closest' to a positive confirmation of ownership, it would be 'Yes, there is.', implying its existence and potentially ownership, but this is a weak inference.

Answer: g) Yes, there is.