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

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

选项 A、in turn
B、in return
C、by chance
D、by turns

答案A

解析 本题考查介词短语辨析。in turn“依次,轮流,反过来”;in return“作为报答”;by chance“偶然,意外地”;by turns“轮流,交替”。句意为:压力大的环境导致不健康的饮食习惯,而不健康的饮食习惯又增加了犯心脏病的危险。
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