During the time of the member's intervention, he is free to use any of that time for a question to a member opposite or otherwise. Within that 10 minutes timeframe that he has he can either speak or ask questions, whichever he might choose later on. If he has a question that he wants to put, he should feel free to do it during this period. It is entirely his period to do with as he chooses, either to simply make a speech or mix it with questions. The floor is his to do as he chooses.
In the House of Commons on April 24th, 2001. See this statement in context.