仿照例子填空。

例： do → did  

buy →                              row →                             see →               

go →                               leave →                             get →              

take →                             sing →                              have →              

eat →                               come →                            put→              

1000000美元面值的3个月国债，按照8%的年贴现率来发行，则其发行价为（）美元。

A.920000

B.980000

C.900000

D.1000000