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David received a parrot for his birthday. The parrot had a poor vocabulary (词汇量), and many were not polite. David tried hard to 1 the bird's words and was often 2 polite words, playing soft music, trying anything he could 3 to set a good example. But nothing 4 . He shouted at the bird and the bird just got angry and became even 5 .Finally，without any hope， David put the 6 in the freezer. For a few moments he heard the bird kick(踢) and cry loudly in it. Then suddenly it was 7 -not a sound for half a minute. David was 8 that he might have hurt the bird and quickly 9 the freezer door. The parrot quietly 10 out onto David's arm and said，