We don’t think the experiment is ______ failure. At least we have gained ______ experience for future success.

A．the; a

B．a; /

C．a; an

D．the; the

企业期初短期借款余额为100000元，本期借方发生额为70000元，本期贷方发生额为90000元，则短期借款期末余额为( 　　)元。

A．80000
B．100000
C．60000
D．120000