单选题：TASK TWO--CALLERS，S PURPOSESFor questions l 8—22，match the e

TASK TWO--CALLERS，S PURPOSES
•For questions l 8—22，match the extracts with the callers’ purposes，listed A—H．
•For each extract，choose the caller’s purpose stated．
•Write one letter(A—H)next to the number of the extract．

请根据以上内容回答71～75题。
回答听力第18题：_________。