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Too much pressure from study leads to sleeplessness, which _______ increases the risk of forgetfulness.

A. in turnB. in return     C. by chance D. by choice

 

A

【解析】

试题分析:A. in turn依次,轮流,反过来,B. in return做为回报,C. by chance偶然,D. by choice自愿,句意:来自学习的太大的压力导致失眠,这反过来增加了健忘了危险。所以选A。

考点:考查介词短语

 

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