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听力原文：W: When was the last time you cleaned this apartment? M: When was the last time my mother came over? Q: What does the man mean? (17)A.
He hasn't had time to find another apartment.
B.
His mother cleaned his apartment every day.
C.
He hasn't cleaned the apartment since his mother came to see him.
D.
His mother was the last person to come over to his apartment.
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皮皮学刷刷变学霸
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【简答题】糖及多羟基化合物与硼酸形成络合物后
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