句型转换。

1. I was born in Tianjin. (对画线部分提问)

    _______ you _______?

2. The children didn't go to the Great Wall last Sunday. (肯定句)

  The children _______  the Great Wall last Sunday.

3. They had a swim there yesterday. (一般疑问句)

   _______  they _______  a swim there yesterday  ?

4. It was Friday yesterday. (对画线部分提问)

     _______ it yesterday ?

5. —Were you in your office yesterday morning? (否定回答)

   —_______, I _______.

与胎盘早剥无关的病因是()

A．腹部受外伤

B．并发妊高征

C．胎盘面积过大

D．脐带过短

E．羊水过多