Overuse of puters largely to the failure of his eyesight，which is also a warning message for us all．
A. contributes
B. turns
C. devotes
D. adjusted
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(答案→)A. contributes
B. turns
C. devotes
D. adjusted
解析：考查动词：这几个动词都可以搭配to，A．contributes to贡献，导致B．turns to求助于，转身．devotes to投入D．adjusted to调整，句意：过度使用电脑主要会导致视力的下降，这也是对我们所有人的警告。选A。