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王老师:19139051760(拨打)
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第1题

As our factory is at present fully occupied with orders we regret having to ( ) yours.
A. refuse
B. cancel
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第2题

We are afraid that we have to charge more for the designated packing, as it ( ) extra labor and cost.
A. calls on
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第3题

( ) our customers now urgently need the goods, we must ask you to make the earliest possible delivery.
A.As
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第4题

The documents will be sent to you under separate ( )
A.covering
B. cover
C. coverage
D.covered
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