摘要: 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[答案]A. in turn.[注释]in turn 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 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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