The offer ___ on August 30th. Your early reply by fax will be ap

The offer ___ on August 30th. Your early reply by fax will be appreciated.
A、extends
B、expires
C、includes
D、stops
【正确答案】：B
【题目解析】：expire到期句意：该报价8月30日到期。请早日传真回复，不胜感激。