1 . The past 71 years has w_______ the great changes of our country. (根据首字母单词拼写)
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2 . Hurry up, water has already s________ out of his burst pipe and onto the floor. (根据首字母单词拼写)
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3 . Birds are widely believed to have ________ (进化) from dinosaurs. (根据汉语提示单词拼写)
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4 . I don’t ________ (后悔) what I said. (根据汉语提示单词拼写)
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