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單項選擇題

（）your Enquiry No.123，we are sending you a catalog and a sample book for your reference.

A.According
B.Asper
C.As
D.About

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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

單項選擇題

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

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