问题补充：
Do please your work; you must concentrate on what is important for your future development.
A. refer to
B. adapt to
C. attend to
D. relate to
答案：
A. refer to
B. adapt to
(答案→)C. attend to
D. relate to
解析：短语辨析。A提到，谈到；参考；B适应；C注意，处理；D与…有关；涉及；句意：一定要注意你的工作，你一定要集中注意力与那些对你为了发展重要的东西。根据句意说明C正确。
