句型转换(每空一词)。
1. Anna was born in 1982. (对画线部分提问)    
                   was Anna born?  
2. Mozart started writing music at the age of four. (改为一般疑问句)    
                    Mozart                writing music at the age of four?  
3. I learned English for 12 years. (对画线部分提问)
                                  did you                                  ?  
4. He spent four hours doing his homework. (改为否定句)
    He                                four hours doing his homework.  
5. The bag is very heavy. I can't carry it. (合成一个句子)
    The bag is                 heavy                 me                carry.

—The bag is very          . Can you help me carry it?
—Sure.

—The bag is very ______. Can you help me carry it?
—Sure.