—Hello, may I speak to Mr Green, please?

—Sorry. He          a meeting. Can you call him later?

A．has

B．is having

C．will have

D．had

下列关于贴水和升水计算方法的说法中正确的为（）

A.在直接标价法下，升水时的远期汇率等于即期汇率减去升水数

B.在间接标价法下，升水时的远期汇率等于即期汇率加上升水数

C.在间接标价法下，升水时的远期汇率等于即期汇率加上升水数

D.以上判断都不对。