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?