单项选择题

·You will hear part of a business negotiation between Mr. Mitchell and Madam Li. ·For each question 23—30, mark one letter A, B or C for the correct answer. ·You will hear the recording twice. Which demands expertise least when it is produced

A． Red.
B． Blue.
C． Black.
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单项选择题
Which is most expensive
A． Black.
B． Brilliant Red K-2BP.
C． Brilliant Blue KNR.
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