句型转换。

1. We went to the library yesterday. (改为否定句)    

    We______  ______ to the library  yesterday,

2. I'd like three hamburgers. (对画线部分提问)    

     ______ ______ hamburgers would you like?

3. David is tall and thin. (对画线部分提问)  

    What does David ______ ______?

4. It's time to have breakfast. (改为同义句)    

    It's time ______  ______.

5. The man has long hair. Do you know him?(合并成一句)    

    Do you know the man ______  ______  hair?

9个亿和6个百万组成的数写作（   ），读作（   ），写成用“亿”作单位的数是（   ）。