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题目内容
（商丘师范学院-基础英语1）
(单选题) There were dirty marks on her trousers ______ she had wiped her hands.(本题1.0分)
A、 where
B、 which
C、 when
D、 that
A、 where
B、 which
C、 when
D、 that
参考答案
