1. They have cleaned the classroom. (改为一般疑问句并作肯定回答)
    ______ they cleaned the classroom? Yes, they ______.
2. I have seen this film. (变否定句)
    I ______ ______ this film.
3. He has got a good education recently. (同义句)
    He has got a good education in ______ ______.
4. His father left Chongqing in 2004. (同义句)
    His father has ______ ______ from Chongqing since 2004.
5. The population of China is over 1.3 billion. (对划线部分提问)
    ______ ______ the population of China?