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    精英家教网 > 高中英语 > 题目详情

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

    A. switchingB. swearingC. swellingD. swinging

    【答案】A

    【解析】

    考查动词词义辨析。句意：在转到新闻学之前，他曾做过图书管理员。A. switching转换；B. swearing发誓；C. swelling膨胀；D. swinging摇摆。根据句意可知，switch to意为“转到”，与题意相符，故选A。

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