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    【题目】There is ________ “o” and ______ “n” in the expression “positive energy”.

    A. an; a B. an; an C. an; the D. the; a

    【答案】B

    【解析】

    句意：在“正能量”的表达中有一个“O”和“N”。这里表示泛指，第一个空o是发音是元音音素；用不定冠词an；第二个空n的发音是元音音素，用不定冠词an。根据题意，故选B。

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