What many scientists believe is that thecontinuedpresence of waterallowedthe earth to dissolve harmful gases and acids into the oceans and seas．题目和参考答案——青夏教育精英家教网—

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3．What many scientists believe is that thecontinuedpresence of waterallowedthe earth to dissolve harmful gases and acids into the oceans and seas．

分析许多科学家认为是水的不断出现，让地球溶解有害气体和酸类进入海洋．

解答答案：continued；allowed
解析：根据句意"许多科学家认为是水的不断出现，让地球溶解有害气体和酸类进入海洋"及所给英文提示可知，本题考查continued"持续不断的"及allow"允许；使；让"这两个单词．另外需要注意的是根据句意可知表语从句需使用一般过去时（因为宇宙大爆炸已经发生，地球已经形成）．

点评本题考查单词填空，做此类题目时一定要仔细分析句子结构并根据句意判断出所缺成分，再找出与所缺成分相对应的英文翻译并注意形式是否会有变化．

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