Although the new road is being used, it has not yet been opened.
A. fluently
B. gradually
C. frequently
D. officially
网友回答
A. fluently
B. gradually
C. frequently
(答案→)D. officially
解析：副词辨析。A流利地；B逐渐地；C频繁地；D正式地，官方地；句意：尽管这条新的路正在被使用，但是它还没有被正式公布。根据句意说明D正确。