改错题。

1. Although we are not in the same school,but we are still good friends._____

2. I would be such tired that I would want to go back home._____

3. He is so young to go to school._____

4. He got up too late that he missed the school bus this morning._____

5. Tom was ill so that he didn’t go to school._____

建设单位将自己开发的房地产项目抵押给银行，订立了抵押合同，后来又办理了抵押登记。则( )。

A．项目转移给银行占有，抵押合同自签订之日起生效

B．项目转移给银行占有，抵押合同自登记之日起生效

C．项目不转移占有，抵押合同自签订之日起生效

D．项目不转移占有，抵押合同自登记之日起生效