句型转换。
1. They have been living in the city since they were born. (改为一般疑问句)
______ living in the city since they were born?
2. It will take about twenty minutes to prepare your dishes. (就画线部分提问)
______ ______ will it take to prepare our dishes?
3. Jack has been to the West Lake twice. (改为一般疑问句)
______ Jack been to the West Lake twice?
4. This boy has visited the Great Wall already. (改为一般疑问句)
______ this boy visited the Great Wall ______?
5. You should get her some flowers for her birthday. (就画线部分提问)
______ ______ ______ get her for her birthday?