1. Why are you doing that?(改为同义句)
    _____ are you doing that_____?
2.You'll be the champion in 7hours.(就画线部分提问)
   _____will you be the champion?
3. This is such a beautiful piece of music.(改为同义句)
   This is_____piece of music.
4.The blue whale weighs more than 26 tons.(就画线部分提问)
   _____the blue whale _____?