They will have an English exam in a week .（就划线部分提问）
______ ______ _____ they have an English exam?
I was having lunch when the UFO landed.（变一般疑问句）
______ _______ ______ lunch when the UFO landed?
The boy was walking down the street when the UFO landed（改为同义句）
______the boy was walking down the street, the UFO______.
He goes to school on foot every day .（同义句）
He ______ _______ school every day.
It took Tom an hour to write to his friend. （同义句）
Tom ______ an hour ______ to his friend.