Although the new road is being used it has not yet been opened.A. fluentlyB. graduallyC.

问题补充：

Although the new road is being used, it has not yet been opened.

A. fluently

B. gradually

C. frequently

D. officially

答案：

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。