根据所给提示，完成句型转换。每空一词，含缩略词。

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?