_Stressful environments lead to unhealthy behaviors such as poor eating habits,whichincrea

_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 turnB. in returnC. by chanceD. by turns解析：考查介词。介词短语in turn的意思是“依次，反过来”，符合语境；in return的意思是“作为……的回报”，by chance“偶然”；by turns “轮流地，逐个地”。

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