10．There is a Chinese story of an old farmer who had an old horse for farming．One day the horse escaped into the hills and，when all the （71）farmer's neighbors sympathized（可怜） with the old man over his （72）badluck，the farmer replied，"Bad luck？Good luck？Who knows？"
A week later，the horse（73）returned with a lot of wild horses from the hills．This time the neighbors congratulated（祝贺）the farmer on his good（74）luck．His reply was still，"Bad luck？Good luck？Who knows？"
Then when the farmer's son was（75）trying to train one of the horse，he fell off its back and broke his（76）leg．Everyone thought this was very bad luck，but （77）except the farmer，whose only reaction was，"Bad luck？Good luck？Who knows？"
Some weeks later，the army came into the （78）village and made every healthy man they found there （79）join the army．When they saw the farmer's son with his （80）broken leg，they let him off．Now was that good luck？Bad luck？Who knows？
