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问题 选择题

They have formed a habit. That is, they celebrate their birthday _____. [ ]

A. annual    

B. monthly    

C. weekly    

D. annually

答案

答案：D

填空题

在处理被卡的刮板链时要（），并挂（）。
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单项选择题

Where goods are to be dispatched by road, rail or air instead of by sea, the documentary credit will call for a road transport document or a rail transport document or an airway bill instead of（）.

A．a bill of exchange

B．a certificate of origin

C．a bill of lading　

D．a certificate of insurance
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