按要求转换句型。
1. Could you show your stamps to us?（同义句转换）
Could you _____ _____ _____ _____?
2. We will meet at 2 o'clock outside the park gate?（对画线部分提问）
_____ _____ _____ _____ we meet?
3. I don't know what I should say.（同义句转换）
I don't know _____ _____ _____ _____ .
4. I would like to make a poster.（对画线部分提问）
___________________________________
5. I have been in Shanghai recently.（改为一般疑问句）
_____ _____ _____ in Shanghai recently?
