Who are they keeping in the kitchen? They are keeping someone in the kitchen for a special purpose, but the specific details are not provided.

How can they open this safe? They can open the safe by using the correct combination or key, though the exact method isn't specified.

What books are people reading this year? The books people are reading this year vary, including new releases and popular titles.

How did the police find the lost man? The police found the lost man through investigation and clues, though specific details are not mentioned.

Who looked after the children for you? The person who looked after the children for you is not specified; it could be a family member, friend, or caregiver.

How long have they waited for the doctor? They have waited for the doctor for a period that is not detailed; it could be a few minutes, hours, or longer.

What time can the boys hand in their papers? The time when the boys can hand in their papers is not specified in the question