题目内容

____ we thank you for your enquiry, we regret being unable to make you an offer for the time being.

A. While
B. When
C. As
D. Since

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Please mark the initials of our company on the ____.

A. inner packing
B. outer packing
C. products
D. boxes

Our strong packing will certainly help ____the sales of the product.

A. promotional
B. promotion
C. promote
D. promoting

We are fully aware ____ the trouble you are faced with.

A. of
B. in
C. at
D. /

____ heavy commitments, we cannot accept any fresh orders.

A. Since
Because
C. Owing to
D. As

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