You should search for some information and learn more about the rules __________________ you visit the Science Museum.

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1. (2020九上·瑞安期中) You should search for some information and learn more about the rules __________________ you visit the Science Museum.

A . until B . before C . while D . after

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浙江省温州市瑞安市六校联盟2021届九年级上学期英语期中检测试卷