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【单选题】
the freezing point is the temperature _______water changes into ice a at whichA.
At which
B.
On that
C.
In which
D.
Of what
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反馈参考答案：
举一反三
【简答题】如图直线AB、CD、EF相交于O，∠AOE的对顶角是______．
【单选题】I lost a book, ______I can't remember now.
A.
whose title
B.
its title
C.
the title of
D.
the title of that
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