The letter we sent last week is an enquiry _______ color TV sets.
A、aboutB
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Please____us your competitive price for the following items.
No discount will be allowed ____ you could place an order for more than 5,000pcs.
______our catalogues for your reference.
On receipt of your instruction, we shall carry out this order ______.
We would like to take this ______ to establish business relations with you.
