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 _______.

期货交易所开市前，非结算会员结算准备金余额（）规定或者约定最低余额的，全面结算会员期货公司应当禁止其开仓。

A．大于

B．小于

C．等于

D．小于等于