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單項(xiàng)選擇題

We confirm（）your order No.7891 dated May 10，1990.

A．to have received
B．having received
C．receiving
D．toreceive

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We regret（）to accept your terms of payment and therefore have to return the order to you.

A.cannot
B.being unable
C.not able
D.not be able

單項(xiàng)選擇題

We will（）you as soon as the new crop comes to the market.

A.contact with
B.contact
C.contact to
D.getcontact