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    It is said that 30% of the apples here _______ from abroad while 80% of the rice _____ grown here．   
    A．is; are B．are; isC．are; are D．is; is
    B
    考察主谓一致。分数及百分数作主语时谓语动词的单复数根据其后面的名词，后面的名词是可数名词复数，则谓语动词使用复数；后面的名词是不可数名词，则谓语动词用单数。本题第一空的apples是可数名词复数，则谓语动词用复数。第二空的rice是不可数名词，则谓语动词用单数。故B正确。
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