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In the after-class activities，the students had plenty of_________and gained a lot of practical _________.
A．experience;experiences
B．practices;experience
C．practice;experience
D．exercise;knowledges
C?
practice和knowledge都是不可數(shù)名詞，排除B、D兩項(xiàng)；experience既可作可數(shù)名詞“經(jīng)歷”，也可作不可數(shù)名詞“經(jīng)驗(yàn)”。在此應(yīng)為“經(jīng)驗(yàn)”之意，為不可數(shù)名詞。?
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