-Are these ____ (you) pencils?-Yes, they are ____(our).
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____(I)dog is white. But ____ (she) is black.
Trees are planted in ___ (we) country every year, which makes our country more and more beautiful.
____ of the twins are in our class.
单选题-碳酸锂主要用于治疗
A. 精神分裂症
B. 抑郁症
C. 躁狂症
D. 焦虑症
E. 失眠
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