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The doctors say that good diet, exercise and fresh air, all of which _____ the health and long life.
A.lead toB.refer toC.stick toD.contribute to
D
考查动词词组辨析。contribute有助于,贡献;lead to“导致”;refer to“关于,涉及”;stick to“坚持”,根据句意“医生说适当饮食,锻炼及(呼吸)新鲜的空气,所有这些都有助于身体健康和长寿”,可知D最佳。
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