The subject of these lectures _______ by the lecture committee.
The subject of these lectures _______ by the lecture committee.
A、announces
B、have been announced
C、announced
D、has been announced
【正确答案】：D
【题目解析】：D现在完成时的被动语态为：have been+done (译：讲座的课题已由讲座委员会宣布了。)
Top
×
×