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英语问题Wherearetheotherstudents?-Theyare-------------.Aintheteachers'officeBinteacher'soffice求答案和解释,谢谢

题目详情
英语问题
Where are the other students?-They are -------------. A in the teachers' office B in teacher's office 求答案和解释,谢谢
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答案和解析
A.如果选b,应该是 in the teacher's office