句型转换。 1. Will there be less pollution in the world? (改为肯定句) ____ ____ ____ less pollution in the world. 2. There will be only one country. (改为否定句) ____ ____ ____ ____ one country. 3. We often do some exercise in the morning. (改为否定句) ____ ____ ____ ____ exercise in the morning. 4. I think my sister will be an English teacher in five years. (对画线部分提问) ____ ____ you think your sister ____ ____ in five years? 5. His mother often goes to school by bike. (改为同义句) His mother often ____ to____.