填空题 But about a year after her diagnosis she became very interested in the songs 1 her 11-year-old granddaughter was listening to.
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【正确答案】 1、that/which    
【答案解析】[解析] 引导词在定语从句中作介词的宾语，先行词为“songs”，又因为介词未提至引导词之前，故使用that/which都可以。