1. The sandstorms did great harm to many plants and houses. （改为一般疑问句）
__________ the sandstorms __________ great harm to many plants and houses?
2. Jim has stayed in the college for five years. (对划线部分提问)
_________ _________ has Jim stayed in the college?
3. The students sweep their classroom after school every day. (改为被动语态)
Their classroom __________ _________ after school every day.
4. Jack is so young that he can’t understand the problem. （保持句意基本不变）
Jack is not old __________ __________ understand the problem.
5. Sierra said, “The movie is going to be exciting.” （改为间接引语）
Sierra said _________ the movie _________ going to be exciting.
