填空题 She was a very 1 social scientist. She proved that apart from self-love, there were other basic human instincts.(observe)
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【正确答案】 1、正确答案：observant    
【答案解析】解析：(句意：她是一位观察力敏锐的社会科学家，她证实除了利己主义，人类还有其它本能。此处应用一个形容词修饰social scientist。observant善于观察的；机警的；严格遵守的。)