I was halfway back to the cottage where my mother lived ________ Susan caught up with me. ( 章节：8 难度：3)_做题室

单项选择题I was halfway back to the cottage where my mother lived ________ Susan caught up with me. ( 章节：8 难度：3): A、when; B、while; C、until; D、through

正确答案：A
答案解析：
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