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题目内容
(内蒙古农业大学-大学英语4)
(单选题) _____, water turns into ice.(本题3.5分)
A、 When freezing
B、 When frozen
C、 When it has been frozen
D、 When freezes to it
A、 When freezing
B、 When frozen
C、 When it has been frozen
D、 When freezes to it
参考答案