2. 外语
  3. To tell you the truth, it’ s very hard for us to help them get rid of Internet addiction.But we __________on this problem trying

To tell you the truth, it’ s very hard for us to help them get rid of Internet addiction.But we __________on this problem trying

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问题 To tell you the truth, it’ s very hard for us to help them get rid of Internet addiction.But we __________on this problem trying to improve the situation.
选项 A、worked
B、had worked
C、are working
D、had been working
答案C
解析 根据语境意义,我们可知这个动作正在进行中,因此用现在进行时。
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