—Is there any possible way to help them get rid of such a bad habit? —To tell th

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问题 —Is there any possible way to help them get rid of such a bad habit? —To tell the truth, it’s very hard. But we______on this problem.

选项 A、worked
B、had worked
C、are working
D、had been working

答案 C

解析本题综合考查动词时态的应用。结合句意，第二个说话者要表述的意思应该是“老实说，这很难，但我们正在努力解决这个问题。”所以应该用现在进行时表示现在正在进行的动作，故选C项。

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