用所给单词的适当形式填空。

1. There are two ______(librarian) in our school.

2. He ______(be) to Beijing two times.

3. Yesterday many boys ______(take) trains to Shanghai.

4. What year ______(be) you born?

5. I told my mother I ______(have) an English exam next week.

电子国债资金账户变更交易是指（）下国债的托管账户由一张卡变更到另一张卡中。

A.同一客户号下

B.相同的证件号

C.直系亲属间