填出单词,正确形式.It is difficult for the old to keep up with the rapid p____ of change
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填出单词,正确形式.It is difficult for the old to keep up with the rapid p____ of change
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keep up with the pace of ...
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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