问题
选择题
the girl was walking down the street, the alien into a store.
A. Until; went B. While; went C. While; was going
答案
答案：B
考查时间状语从句。While与进行时连用，排除A。“正在做某事时，另一件事突然发生”，突然发生的事不能用进行时，排除C。故选B。
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