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單項(xiàng)選擇題

（），we are airmailing you our latest quotation-sheet.

A.As request
B.At request
C.As requested
D.At requested

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We have received your letter of September 12，（）we are glad to know that you are interested in our electric heaters.

A.which
B.at which
C.from which
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單項(xiàng)選擇題

We are（）to have your enquiry for Sewing Machines.

A.please
B.pleased
C.pleasure
D.in pleasure