题目内容
3.Scientists ______ a way to predict earthquakes,but you can learn to protect yourself during one.( )A. | don't find | B. | didn't find | C. | haven't found | D. | won't find |
分析 科学家还没有找到预防地震的方法,但是你可以在地震时学会如何保护自己.
解答 答案:C.
根据句意"科学家还没有找到预防地震的方法"可知,预防地震的方法到目前为止仍然没有找到,所以用现在完成时表示对现在造成的影响和结果;句末的one指代的是one earthquake.故选C.
点评 对于时态的题目要结合句子的意思来判断具体时态的选择,并非一定要有时间状语.
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