Put a question to each sentence starting with the word in brackets.
Example: He had visited the Tate Gallery by that time. (What) What had he visited by that time?
1 She had shown us the central part of the city by 5 o'clock. (By what time)
2 She had bought all the things for dinner by 12 o'clock. (Had)
3 By that time they had seen most of the Tower of London. (Had)
4 By Saturday Martin had seen all the most popular places of interest in London. (By what time)
5 By 8 o'clock the daughter had prepared breakfast. (Who)