1 . If you o________ a fact or problem, you do not notice it, or do not realize how important it is. (根据首字母单词拼写)
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2 . He made a mistake, for he o______ one important fact.(根据首字母单词拼写)
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3 . We are so busy that we have o_________ all sorts of warning signals about our own health. (根据首字母单词拼写)
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