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.atwhich
C.fromwhich
D.inwhich

單項(xiàng)選擇題

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

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