10.____ 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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11.We are offering you goods ____ the high quality.
A.of
B.at
C.for
D.with
12.A firm offer ____ a time limit for acceptance.
A.may specify
B.never specifies
C.sometimes specifies
D.must specify
13.If you can ____ your price by 5%, we may conclude the transaction with you.
A.offer
B.bring down
C.fix
D.quote
14.The commodities you offered are ____ line with the business scope of our clients.
A.outside
B.out
C.out of
D.without