Ответ:
Pete asked his friend when they were leaving St. Petersburg
They asked him what time the train started
She asked me why I hadn't come the day before
He asked her where she usually spent her summer holiday
She asked me what I would do next day if I were not busy at my office
She asked what places of interest I had seen in London
He asked what I was doing there
Mr. Bird asked when the expedition started
Mother asked where the others were
The teacher asked what exercises I had done in writing students