2. 外语
  3. Stressful environments lead to unhealthy behaviors such as poor eating habits, which______ increase the risk of heart disease.

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

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问题 Stressful environments lead to unhealthy behaviors 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 这是一个涉及惯用法的试题。in turn有两个意思：(1)“轮流”，(2)“反过来”。如：We looked after the children in turn．“我们轮流照看孩子。”Theory is based on practice and in turn serves practice．“理论基于实践，并反过来为实践服务。”in return“报答，回报”，通常后面与介词for连用。如：I wish I could do something in return for your kindness．“但愿我能做些什么以报答你的好意。”by chance“偶然地”，如：I came across this old photo in the drawer by chance．“我偶然在抽屉里看到了这张旧照片。”by turns“轮流，交替”，如：She laughed and cried by turns．“她一会儿笑一会儿哭。”按照本句意思，只有in turn合适。
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