句型转换。 1. We are going to the downtown by bus . (对划线部分提问) _______  _______  you _______ to the downtown? 2. They are going to hold an exhibition .(对划线部分提问) _______ are they going _______  _______ ? 3. He is going to the supermarket at 19:00. His friends are going to the supermarket  at 19:00. (合并成一句) He and his friends are going to the supermarket at _______ _______  _______. 4. He wrote an article to the newspaper. (用next month 改写) He is _______  _______  _______ an article to the newspaper next month. 5. She is going to be an artist. (用an engineer改为选择疑问句) Is she going _______ _______ an artist _______ an engineer?