题目内容
18.Eating a balanced diet and getting adequate sleep are key ________ maintaining a healthy and vigorous state of life.( )A. | in | B. | by | C. | to | D. | for |
分析 均衡的饮食和充足的睡眠是保持一个健康的和精力旺盛的生活状态的关键.
解答 答案C.
A项"按照(表示方式);从事于;在…之内";B项"通过;被;依据;经由;在附近;在…之前";D项"为了;因为;给;对于;至于";C项"到;向;(表示时间、方向)朝…方向";固定短语"the key to sth/doing 做某事的关键","the key to maintaining a healthy and vigorous state of life 保持一个健康的和精力旺盛的生活状态的关键";因此C项符合语境,故选C.
点评 本题考查介词短语辨析.解答此类题目首先要读懂句意,然后根据上下文语境锁定合适的介词短语.平时学习中要加强介词短语的积累.

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