按要求改写句子。

1.The students have no classes on Sunday. (改为反意疑问句)

   _______________________________________________________?

2. Is your son showing his friends the photos now? (用often代替now) 

   _______________________________________________________?

3. Would you like juice or coffee? (改为同义句)

    _______________________________________________________？

4. What does your mother want you to do? (用make cakes作答) 

    _______________________________________________________.

某银行资产价值为1000亿元，负债价值为800亿元，资产的加权平均久期为5年，负债的加权平均久期为3年。如果市场利率由4%降为3.5%，则该银行资产价值( )亿元。

A．减少约24

B．增加约24

C．减少约22

D．增加约22