-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 trying to improve the situation. A.worked B.had worked C.are working D.had been working 解析:考查动词时态.语境意义:“这个问题还没解决.我们正在努力解决这个问题 .因此用现在进行时表示现阶段内一直进行的动作. 答案:C 【查看更多】
