【題目】A healthy diet and adequate physical exercises are the keys ______ a better life.

A.of havingB.to haveC.for havingD.to having

【答案】D

【解析】

考查固定搭配。句意：健康的飲食和適當(dāng)?shù)捏w育鍛煉是擁有更好生活的關(guān)鍵。固定搭配：the key to sth./doing sth.“某事或做某事的關(guān)鍵”，此處to是介詞，后面用動(dòng)名詞作賓語(yǔ)。故選D。

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