题目内容
17.How life began on earth is one of the biggestpuzzles(迷;难题)that scientists found hard to solve.分析 地球上的生命是如何开始的是科学家发现很难解决的最大的难题之一.
解答 答案:puzzles 考查翻译填空.puzzle意为"迷;难题",是可数名词,one of…后的名词要用复数,其复数形式是puzzles.
点评 考查翻译填空,准确地理解句子、翻译句子,然后根据句意及提示确定所填单词词性,正确写出单词完成句子,使句意更通顺.
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