Susan was reading a newspaper on the train_________ a strange old man come over. A. when B. while C....
2023-02-10 05:41:33 39次 2013-2014学年江苏省江阴市顾山九年级上学期期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Susan
was reading a newspaper on the train_________ a strange old man come over.
A. when
B.
while
C. before D. after
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