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最佳答案：the most worrying problem
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最佳答案：担忧的问题直接用concern就可以表示了Environmental issue is one of our most concerns.
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最佳答案：It is obvious that the Economic situation of America is worrying.
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最佳答案：the harm done to
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最佳答案：For these days,it has become the most disturbing problem which worries me a lot.
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最佳答案：In my opinion,life,first,there are many problems to resolve on its own can not r
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最佳答案：Since the nuclear power station of Japan had lead to a serious leakage last year
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最佳答案：Recently, I found that many students copied from another , without his own think
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最佳答案：年少不知何为愁,望天方见月明头,曾祖已至耄耋年,屋中无亲侍左右；感其数年养育恩,愧己长久离家游,速盼佳节归乡日,阖家欢笑聚炕头尽力了
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最佳答案：That boys regardless of the mother's concern,swimming in the deep sea in the two