问题描述：
1.Winter is the time of year the days _____ are short and nights are long.(when or that) why?
2.Hi you look tired.
I am tired.I______ the living room,all day.
A.have been painting B.have painted
老师说选A,判断不出来啊?
2.Hi you look tired.
I am tired.I______ the living room,all day.
A.have been painting B.have painted
老师说选A,判断不出来啊?
问题解答：
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