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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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單項(xiàng)選擇題

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

A.on
B.in
C.about
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單項(xiàng)選擇題

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

A.in
B.on
C.of
D.having