单项选择题

Evening dress necessary（）

A．You must wear your evening dress.
B．You don't have to wear evening dress, but you can if you like.
C．Evening dress will make you look nic

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单项选择题
Export documentation may be required for non-EU destinations.Packages sent outside the EU （）

A．must be documents only.
B．will need special documents.
C．might need special documents,
单项选择题
All speakers produce summaries of the sessions they gave.The speakers should write （）

A．a proposal for their session.
B．a brief report about their session.
C．full details of what is in their session.
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