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【题目】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

【答案】B

【解析】句意:——你们找到了昨天在山中失踪的夫妇了吗?——还没有,但是我们一直在努力与他们取得联系。因为ever since 是“自……以来”之意, 常与完成时连用,又根据but可知,现在仍在设法与他们取得联系,所以用现在完成进行时。

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