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
考查動詞詞組辨析。contribute有助于，貢獻(xiàn)；lead to“導(dǎo)致”；refer to“關(guān)于，涉及”；stick to“堅(jiān)持”，根據(jù)句意“醫(yī)生說適當(dāng)飲食，鍛煉及（呼吸）新鮮的空氣，所有這些都有助于身體健康和長壽”，可知D最佳。
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