單項選擇題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
D.in which


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1.單項選擇題We are()to have your enquiry for Sewing Machines.

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

4.單項選擇題We shall do everything possible to assist you in()a mutually beneficial trade.

A.developing
B.developed
C.develop
D.development

5.單項選擇題We will consider()your terms of payment.

A.accepted
B.to accept
C.accepting
D.accept