把下列句子改为间接引语 1. "What are you doing,Tom?"

问题：

把下列句子改为间接引语

1. "What are you doing,Tom?"

    I asked Tom what                            .

2. "Do you often come to school by bus?"

    My classmate wanted to know if                     .

3. "Why can you finish it so soon,children?"

    Mom asked the children why                       .

4. "Li Xin is better at English than math," said the teacher.

    The teacher said that                            .

5. "My father has been to Hong Kong twice. " he said.

    He said that                              .