(2009天津河东一模)Some students are net surfing．which does great harm to their physical and mental health
A. addicted to
B. related to
C. addicting to
D. relating to
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(答案→)A. addicted to
B. related to
C. addicting to
D. relating to
解析：be addicted to沉迷于，be related to与……有关，和……有联系。由题意可知，A项正确。