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Stressful environments lead to unhealthy behaviors such as poor eating habits, which _____ increase the risk of heart disease.

  A. in turn  B. in return  C. by chance D. by turns

A  


解析:

in turn (插入语)转而,依次,而又:We need revision of estimated sales and this, in turn , will mean revision in production schedule. (我们必须修改预计销量,而这反过来又意为这修订生产计划。)in return 作为报答: I wish I could do something for you in return. (我要是能为你做点事作为报案就好了。)I gave him a present but he gave me nothing in return.(我送给他一份礼物,可他却什么也不给我作为答谢。)by chance (=by accident)偶然地;无意中:I meet him by chance on Fifth Avenue.(我偶然在第5大街上遇到他。)by turns 轮流地,依次:There were twelve of us in the boat and we rowed by turns.(船上有12人,我们轮流划船。)

  本题译文:紧张的环境会导致诸如不良的饮食习惯等不健康行为,而后者又会增加患心脏病的危险。

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