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單項(xiàng)選擇題

We regret to report that a consignment of silk piece goods（）Order No.567 has not been delivered．

A.with
B.for
C.on
D.under

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Our company has 30years’ experience（）the machinery line.

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As the goods are（）great demand we regret being unable to cover your requirements.

A.in
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D.having