句型转换。

1. Vera is fourteen years old.(对画线部分提问)

     __________ __________ is Vera?

2. I was born in 1973. (对画线部分提问)

     __________ __________ you born?

3. They have a pop concert every year.(改为一般疑问句)

      __________ they__________ a pop concert every year?

4. How old are you?(改为同义句)

    What's__________ __________?

5.You are welcome.(改为同义句)

    That's__________ __________.