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Questions 11–17 A cruise line is scheduling seven week-long voyages for the ship Freedom. Each voyage will occur in exactly one of the first seven weeks of the season: weeks 1 through 7. Each voyage will be to exactly one of four destinations: Guadeloupe, Jamaica, Martinique, or Trinidad. Each destination will be scheduled for at least one of the weeks. The following conditions apply to Freedom’s schedule: Jamaica will not be its destination in week 4. Trinidad will be its destination in week 7. Freedom will make exactly two voyages to Martinique, and at least one voyage to Guadeloupe will occur in some week between those two voyages. Guadeloupe will be its destination in the week preceding any voyage it makes to Jamaica. No destination will be scheduled for consecutive weeks.
13. If Freedom makes a voyage to Trinidad in week 5, which one of the following could be true? (A) Freedom makes a voyage to Trinidad in week 1. (B) Freedom makes a voyage to Martinique in week 2. (C) Freedom makes a voyage to Guadeloupe in week 3. (D) Freedom makes a voyage to Martinique in week 4. (E) Freedom makes a voyage to Jamaica in week 6.
为什么A不行呢? 我排的是 TMGMTJT , 哪里不符合题意了呢?
求救啊~~~~~~~~~ |
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