问题描述：
You ( ) things.You should be careful.
A.always lose B.were always losing
C.have been losing D.are always losing
这个题答案是D,可是我不明白为什么.
A.always lose B.were always losing
C.have been losing D.are always losing
这个题答案是D,可是我不明白为什么.
问题解答：
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