单项选择题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.单项选择题We are()to have your enquiry for Sewing Machines.

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

4.单项选择题We shall do everything possible to assist you in()a mutually beneficial trade.

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

5.单项选择题We will consider()your terms of payment.

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

6.单项选择题We()the seminar sponsored by you in September last year.

A.aware
B.aware of
C.are aware of
D.are aware

7.单项选择题One of our clients is()the market()Men’s Shirts.

A.on,of
B.at,with
C.in,for
D.with,at

8.单项选择题We are pleased to say that we are()to supply you()the goods you want.

A.of a position,──
B.at a position,──
C.in a position,with
D.at a position,with

9.单项选择题(),we are airmailing you our latest quotation-sheet.

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