【題目】It hasn’t been ______ that food from cloned animals is really safe for humans to eat.

A. confirmed B. considered

C. turned out D. proved

【答案】A

【解析】

試題分析：考查動詞及短語詞義辨析。動詞confirm確認；consider考慮，認為；turn out結(jié)果是；prove證明；句意：由克隆動物生成而來的食物能否安全食用還沒有被確認。根據(jù)句意可知A正確。

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