题目

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: 本题考查现在进行时态的用法。从句子后面的时态"because they play computer games too much”可以看出，是“现在一直在做的动作”。

查看本题答案和解析