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23. There is evidence that solar energy either is now economically competitive with conventional sources of heat ______ so within a few years.
(A) will be or
(B) but will be
(C) or will be
(D) and will be

教甄◆英文-國小- 100 年 - 100 新北市國民小學暨幼稚園教師甄選：英語#5108

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	1F Su Chen Cheng 國二下 (2011/06/29) conventional 習慣的,慣例的檢舉
	2F (⁎⁍̴̛ᴗ⁍̴̛⁎) 大二下 (2024/02/07) either .... or ...... Either/or is a word pair used to show a contrast. When using either/or and neither/nor use a singular verb in the sentence if both the subjects (nouns) are singular, for example, “either my sister or my brother is coming”. 想說為啥不能用and 檢舉

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