单项选择题

---I have an appointment with Prof.Clinton. ---You_____beMr. SmitProf.Clinton is waiting for you in his office.


A.could
B.might
C.must
D.should

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单项选择题

Jane sent you a letter yesterday. Have you______it? 


A.caught
B.received
C.passed
D.Obtained

多项选择题

下列各项中并不导致两种成本计算法下分期营业利润出现狭义差额的是（）。‌

A．销售费用在计入损益表的位置和补偿途径方面的不同
B．变动生产成本
C．对固定性制造费用处理方法的不同
D．销售收入