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 (插入語)轉(zhuǎn)而，依次，而又：We need revision of estimated sales and this, in turn , will mean revision in production schedule. (我們必須修改預(yù)計(jì)銷量，而這反過來又意為這修訂生產(chǎn)計(jì)劃。)in return 作為報(bào)答: I wish I could do something for you in return. (我要是能為你做點(diǎn)事作為報(bào)案就好了。)I gave him a present but he gave me nothing in return.（我送給他一份禮物，可他卻什么也不給我作為答謝。）by chance (=by accident)偶然地；無意中：I meet him by chance on Fifth Avenue.(我偶然在第5大街上遇到他。)by turns 輪流地，依次：There were twelve of us in the boat and we rowed by turns.(船上有12人，我們輪流劃船。)

　　本題譯文：緊張的環(huán)境會(huì)導(dǎo)致諸如不良的飲食習(xí)慣等不健康行為，而后者又會(huì)增加患心臟病的危險(xiǎn)。

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