______that the demand for power continues to rise at the current rate, it will not be long before traditional sources become ina

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问题 ______that the demand for power continues to rise at the current rate, it will not be long before traditional sources become inadequate.

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

答案C

解析 本题考查连词。concerning和regarding均为介词,意为“关于”。ascertaining是动词ascertain的分词形式,意为“查明,弄清,确定”。其后可以接that引导的宾语从句。assuming为连词,置于句首,与that连用,相当于if,表示“假如,如果”,引导条件状语从句。由前半句“电力需求继续以目前的速度增长”和后半句的“传统能源不久将会变得不足”可知,[C]项符合句子的逻辑,故为正确答案。
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