句型转换。
1. I was born in Changchun in 1990.(就画线部分提问)
________ ________ ________ ________you born?
2. He first had a party when he was ten.(改为同义句)
He first had a party________ ________ ________ ________ten.
3. This box is too heavy. He can't carry it.(改为同义句)
The box is ________ heavy________him________ ________.
4. The girl became a movie star when she was twenty.(就画线部分提问)
________ ________she________a movie star?
