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Teenagers _____their health because they play computer games too much.

A．have damaged B．are damaging
C．damaged D．will damage

B

解析試題分析:考查動詞時態(tài)。因為后面because引導的狀語從句用一般現(xiàn)在時，所以排除C、D選項�，F(xiàn)在完成時表示已經(jīng)發(fā)生或完成的動作，而現(xiàn)在進行時表示一直進行的動作，從語境判斷在玩電腦游戲時，就一直在損害著自己的健康，所以B選項正確。句意：青少年在損害著自己的健康，因為他們玩太多的電腦游戲。
考點：考查動詞時態(tài)。

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