【題目】Teenagers __________ their health because they play computer games too much.

A. have damaged B. are damaging

C. damaged D. will damage

【答案】B

【解析】句意:由于青少年玩太多的電腦游戲,他們正在損害自己的健康。根據(jù)because引導(dǎo)的原因狀語從句,可知主句講的是現(xiàn)在正在進(jìn)行的一種動作,所以應(yīng)使用現(xiàn)在進(jìn)行時,故B項正確。

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