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?

我国北回归线以北的地区，白昼时间比黑夜长，且白昼一天比一天短的时期是[ ]

A．春分日→夏至日

B．夏至日→秋分日

C．秋分日→冬至日

D．冬至日→春分日