| 31. | "I'll try to do my best, knock on wood.
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| 32. | Knock on wood I've never been in serious trouble.
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| 33. | When Evelyn Glennie knocks on wood, you hear it.
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| 34. | It's also why people knock on wood for luck.
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| 35. | "Knock on wood I'm over the elbow injuries.
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| 36. | I haven't noticed such trouble since-knock on wood!
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| 37. | "Knock on wood, " said his mother, Rose.
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| 38. | So far nothing has happened-- knock on wood.
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| 39. | That didn't happen yet, knock on wood ."
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| 40. | Knock on wood, forecasters have been off before,
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