I don’t think the experiment is ______ failure. At least we have gained ______ experience for future success.  
A.不填;theB.a(chǎn); theC.a(chǎn) ; 不填D.不填; 不填
C
考察冠詞的用法。Failure是一個(gè)抽象名詞,如果僅表示失敗的概念,是不可數(shù)名詞;表示失敗的人或事,就成了可數(shù)名詞,前面加a或an。experience作經(jīng)歷講時(shí),是可數(shù)名詞;做經(jīng)驗(yàn)講,是不可數(shù)名詞。
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