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英语高考28.Although the causes of cancer ,we do not yet have any
题目内容：
英语高考28.Although the causes of cancer ____,we do not yet have any practical way to prevent it.
28.Although the causes of cancer ____,we do not yet have any practical way to prevent it.
A.are being uncovered B.have been uncovering
C.are uncovering D.have uncovered
如果选项E是have been uncovered,那是选E还是A?,还是EA都行?
如何知道语义是正在被发现还是已经被发现?
要详解.
英语高考28.Although the causes of cancer ____,we do not yet have any practical way to prevent it.
28.Although the causes of cancer ____,we do not yet have any practical way to prevent it.
A.are being uncovered B.have been uncovering
C.are uncovering D.have uncovered
如果选项E是have been uncovered,那是选E还是A?,还是EA都行?
如何知道语义是正在被发现还是已经被发现?
要详解.
28.Although the causes of cancer ____,we do not yet have any practical way to prevent it.
A.are being uncovered B.have been uncovering
C.are uncovering D.have uncovered
如果选项E是have been uncovered,那是选E还是A?,还是EA都行?
如何知道语义是正在被发现还是已经被发现?
要详解.
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