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    精英家教网 > 高中英语 > 题目详情
    Food safety issues, ____ will seriously affect the growth of teenagers and even the nation’s future.
    A．if not solved properly
    B．not if solved properly
    C．if solved properly
    D．not if properly solved
    A
    考查非谓语动词。根据句意，此处应为否定，排除C. 非谓语动词的否定词not应放在非谓语动词的前面，故排除B和D. 故A项正确。等于if they are not solved properly,  ….。
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