【題目】He worked as a librarian before ________ to journalism .

A. switchingB. swearingC. swellingD. swinging

【答案】A

【解析】

考查動詞詞義辨析。句意：在轉(zhuǎn)到新聞學之前，他曾做過圖書管理員。A. switching轉(zhuǎn)換；B. swearing發(fā)誓；C. swelling膨脹；D. swinging搖擺。根據(jù)句意可知，switch to意為“轉(zhuǎn)到”，與題意相符，故選A。

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