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Taking regular exercise and eating a balanced diet are two important keys ________ good health.

Ain Bfrom

Cof Dto

 

D

【解析】D 考察介词。句义:定期做运动和保持均衡的饮食是保持身体健康的两个关键点。Key意为关键,钥匙;后面接介词to,故答案为D

 

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