Toomuchpressurefromstudyleadstosleeplessness,which

问题详情：

Too much pressure from study leads to sleeplessness, which _                   increases the risk of

forgetfulness.

D.    in turn             B. in return               C. by chance                  D. by choice

【回答】

A

知识点：词组 短语

题型：选择题