【題目】The scientist knew nothing about the matter, because he was always ______ himself in his study.

burying

devoting

focusing

concentrating

【答案】A

【解析】本題句意應(yīng)為“這位科學(xué)家對(duì)此事一無所知，因?yàn)樗耦^于自己的研究中”。表示專心于用bury oneself in……。

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