I had wanted to help you last night but I couldn't spare any time, for I ________ a composition which I have to hand in this morning.

A．wrote

B．was writing

C．had written

D．have written

外商投资企业资本金结汇，外汇账户和人民币账户开立不在同一家银行的，人民币资金划入银行应当在（）工作日内（含划入当日）根据支付命令函办理该笔结汇资金的对外支付划转手续。

A.1个

B.2个

C.3个

D.4个