链接汇总上有这个题号，但是打开来却是lsat-3-4-5
7. A certain retailer promotes merchandise by using the following policy:
At all times there is either a “manager’s sale” or a “holiday sale” or both going on. All sales are run for exactly one calendar month. In any given month, if a manager wishes to clear out particular line of merchandise, then a managers’ sale is declared. If a holiday falls within the calendar month and there is excess merchandise in the warehouse, then a holiday sale is declared.
However, there is no holiday that falls within the month of August and, in that month, the warehouse never contains excess merchandise.
Which one of the following can be concluded from the passage?
(A) If a holiday falls within a given month and there is no extra merchandise in the warehouse that month, then a holiday sale is declared.
(B) If a holiday sale is not being run, then it is the month of August.
(C) If a manger’s sale is being run in some month, then there is no excess merchandise in the warehouse in that month.
(D) If there is not a manger’s sale being run some month, then there is holiday sale being run in that month.（D）
(E) If there is no excess merchandise in the warehouse, then it is the month of August.
答案是D，请教大家，A和B该怎么排除？
以前也讨论过，D确实没有问题，可是A、B为什么不对呢?
http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=34456&page=7
我等的花都谢了。。。。。哪位好心人帮忙提点迷津阿。。。。。
哪位好心人可以帮我指点迷津阿。。。。。
a的话，在该月即使存在holiday,还是有可能实行manager sales,
b的话，如果holiday sales没有被实行，并非一定是八月，也有可能是其他月份。
觉得楼主充分和必要没有搞清楚
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