——Did you find the missing couple in the mountain yesterday?
——No, but we to get in touch with them ever since.
A. have tried
B. have been trying
C. had tried
D. had been trying
网友回答
A. have tried
(答案→)B. have been trying
C. had tried
D. had been trying
解析：考查时态题。句意：—你们昨天在山区里找到那对失踪的夫妻了吗？—没有。但是我们正在在努力和他们取得联系。根据句意说明自从过去的一个时间开始到现在，我们一直都在做的事情，那么使用现在完成进行时。故B正确。