根据上下文内容在每一条横线上填上一个适当的单词。

(B=Ben D=David)

B: David, 1.     _    do you often do on Saturdays?

D:  I 2.           do my homework and sometimes I help Mum 3.          housework.

B: How 4.           Sundays?

D:  I like 5.          . So I often go swimming on Sundays.

B: 6._        your sister Nancy go 7.____ you?

D: No, she 8. _      .  She 9. _       shopping.  She often 10.          shopping with my mother.

B:  You have a happy weekend, David.

D: That's right.

从处理方式来看，证券公司都以( )为对手办理清算、交割与交收。

A．证监会

B．交易所

C．其他证券公司

D．上市公司