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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
查看习题详情和答案>>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
查看习题详情和答案>>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
查看习题详情和答案>> 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
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 |