Too much pressure from study leads to sleeplessness, which increases the risk of forgetfulness.
A. in turn
B. in return
C. by chance
D. by choice
网友回答
(答案→)A. in turn
B. in return
C. by chance
D. by choice
解析：句意：来自学习的太大的压力，反过来增加了爱往事的危险。in turn反过来； in return作为报答； by chance意外地； by choice出于选择。根据句意故选A。