__________ that the demand for power continues to rise at the current rate, it will not be long before traditional sources become lacking.
| A．Concerning | B．Judging | C．Assuming | D．Regarding |
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__________ that the demand for power continues to rise at the current rate, it will not be long before traditional sources become lacking.
| A．Concerning | B．Judging | C．Assuming | D．Regarding |
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