| 31. | A round trip between Houston and San Antonio introduces two worlds.
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| 32. | Continental Airlines flies 21 daily round trips between Newark and Boston.
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| 33. | A round trip to Mars would probably take about three years.
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| 34. | It is served by only one round trip train per day.
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| 35. | The round trip ride from Pittsburgh to Ohiopyle was one dollar.
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| 36. | Fans face a 200-mile round trip to see their team?
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| 37. | The 14-day advance purchase fare is $ 905 round trip.
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| 38. | _Is the cost quoted round trip from your home town?
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| 39. | He could have gone round trip for a dollar Canadian.
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| 40. | At first, the passenger fare was 75 cents round trip.
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