To succeed in a scientific experiment _____.A.carefulness is needB.carefulness is one needsC.one needs to be carefulD.one need being careful
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C解析要想在科研实验中取得成功……, 显然句子缺少逻辑主语,所以A,B两项排除. one是第三人称单数,所以C,D中显然是C正确. 另外: need后面接动名词主动形式表被动意义,与need后跟不定式被动意义相同.如: The bicycle needs repairing. =" The" bicycle needs to be repaired