按要求改写句子，每空一词。
1. I find it easy to have a conversation in English (改为一般疑问句)
                                        It            to have a conversation in English?
2. I feel happy when I meet my friends. (就划线部分提问)
               _____ you            when you meet  your friends?
3. To understand American accents is sometimes hard. (用it 作主语改写)
               sometimes hard                        American accents.