【題目】It’s _____ to keep healthy.

A.necessaryB.impossibleC.carefulD.serious

【答案】A

【解析】

句意:保持健康是必要的。

考查形容詞辨析。necessary必要的;impossible不可能的;careful小心的,仔細的;serious嚴重的,嚴肅的。根據(jù)句意和常識可知,保持身體健康很有必要。故選A。

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