填空题 It was said that computers could crash because they were 1(able) to make sense of "00" for the year 2000.
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【正确答案】 1、正确答案：unable    
【答案解析】解析：本题考查构词法中的否定前缀。此空需要填形容词，be able to短语作谓语，根据题意这里需要一个否定意义的形容词，可以通过加前缀un-构成相反意义的形容词。