After the operation, Mr Brown asked my grandfather not only ________ but also ________ oily food．A.to smoke; to eatB.smoking; eatingC.not to smoke; not to eatD.not smoking; not eating
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C解析本题易误选A、B、D，原因是不能正确分析句子结构．题干中由并列连词not only…but also…连接两个并列成分，把并列连词撇开暂时不看，我们不难发现题干句型是ask sb to do sth，又因不定式用肯定式不符合语境意义，故C项为正确