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【題目】I wonder whether buying an electric car ____ a good idea.

A. be B. am C. is D. are

【答案】C

【解析】

試題分析:句意:我想知道是否買一個(gè)電車是一個(gè)好主意。本題考查動(dòng)名詞作主語,謂語動(dòng)詞要用單數(shù)的形式。Be動(dòng)詞的單數(shù)形式是is。根據(jù)句意,故選C

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