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10．Ann got some money，so she bought a new iPhone 7 instead of auselessone．（use）

分析 Ann得到一些錢，所以她買了一部新的iPhone 7代替了一部不能用的．

解答答案：useless
根據該空處在句中作定語修飾one故填入形容詞，所給詞use對應的形容詞有useful意為"有用的"，useless意為"無用的"，結合語境可推知買新的手機代替沒有用的手機，故答案為useless

點評本題考查用所給單詞的適當形式填空，首先要根據語境明確句意，然后再根據相關語法對所給單詞在形式上做出正確的變化

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