题目内容

Teenagers________their health because they play computer games too much.
A．have damagedB．are damaging
C．damagedD．will damage
B
B　[考查时态。句意：因为青少年电脑游戏玩得太多，所以他们正在损害自己的健康。由句意可知，青少年损害健康这一现象正在发生，故用现在进行时。]
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