The Beijing people ________ by the city government to return old wall bricks，but still more than two million such bricks are needed for the repairs．
A.were asked
B.have been asked
C.had been asked
D.were asking
网友回答
B解析句意是“北京市政府已经要求北京市民归还旧城墙的方砖以进行维修”。根据句意可知此句是现在完成时的被动语态。