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Alex was not at home yesterday .He might be ( )his dentist appointment 括号内填A in Bfor Cat、 Don理由

题目详情
Alex was not at home yesterday .He might be ( )his dentist appointment 括号内填A in Bfor Cat、 Don
理由
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答案和解析
C 牙科医生的预约见面中,是用at,是appointment就用介词at与它搭配