______ that the demand for power continues to rise at the current rate, it will

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问题 ______ that the demand for power continues to rise at the current rate, it will not he long before tradi-tional sources become inadequate.

选项 A、Concerning
B、Ascertaining
C、Assuming
D、Regarding

答案 C

解析 assume假设；concerning关于；ascertain确定[+(that)]Can you ascertain who he is?；regsrding关于；就……而论He knew nothing regarding the case．

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