句型转换。
1. There were many students outside.（改为否定句）
There _______ _______ students outside.
2. The weather was fine.（对画线部分提问）
_______ _______ the weather?
3. There are many tall buildings in this city.（用in the past改写句子）
There _______ many tall buildings in this city in the past.
4. This passage comes from a magazine.（对画线部分提问）
_______ _______ this passage _______ from?
5. how old, in 2000, was, your grandfather（连词成句）
____________________________________.
