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I don’t think the experiment is ______ failure, because it has provided us with _____ valuable experience for our future tests.
A．不填; 不填B．a(chǎn); 不填C．a(chǎn) ; aD．不填; a
B
考查冠詞的用法。第一空，failure 為不可數(shù)名詞，在這里用a failure 抽象名詞具體化，指失敗的事，第二空，experience 經(jīng)驗(yàn)，是不可數(shù)名詞，句意：我認(rèn)為這次試驗(yàn)不是一件失敗的事，因?yàn)樗鼮槲覀儗?lái)的實(shí)驗(yàn)提供了有價(jià)值的經(jīng)驗(yàn)。
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