句型转换，不改变原意。

1. This hotel is the best of all in the city. (不改变原意) 

    This hotel is better      __                           hotel in the city.

2. Playing the piano is not easy to learn. (不改变原意) 

       __    is not easy _      playing the piano.

3. Zhou Qiang doesn't run as fast as I do. (不改变原意) 

    Zhou Qiang runs _   __             _I do.

4. The boy doesn't do as well as the girl. (不改变原意) 

    The boy does _  _               _the girl.

5. All the runners start to run as soon as they hear the gun. (不改变原意) 

    All the runners start to run_____  _____  _____.