1. They moved to New York a month ago. (对划线部分提问) 
     ___________ ___________ they ___________ to New York?
2. They enjoyed the concert very much. (对划线部分提问) 
    ___________ ___________ they ___________ the concert?
3. Sophie has to look after her sick sister at home.(变成一般疑问句)
    ___________ Sophie ___________ to look after her sick sister at home?
4. Jim is 15 years old. Kate is 14 years old.(合并成一句) 
    Jim is ___________ ___________ Kate.
5. We often go hiking in spring. (用tomorrow改写) 
     We ___________ ___________ ___________ tomorrow.
6.  It took my mom five hours to make the big meal. (同义句) 
      My mom ___________ five hours ___________ the big meal.
7.  It's two hours'walk from here to the subway station. (对划线部分提问)
      ___________ ___________ is it from here to the subway station?
8. 天下雨时，我打的去上学。
      When it ___________, I ___________ a taxi to work.
9.   至于今天的作业，你最好问问萨姆。
      ___________ for today's homework, you'd better ask Sam.