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單項(xiàng)選擇題

A 3% discount will be granted only（）your order exceeds US$12，000.

A.depends on
B.for condition that
C.on condition that
D.subject to

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Because of the（）nature of the agreement，I was reluctant to discuss with him in office.

A.confidential
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We（）your letter of Nov.3 asking us to make a quotation.

A.go over
B.have read
C.refer to
D.check up

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