The teacher advised his students that in the presence og the
The teacher advised his students that in the presence og the visiting mayor they should not say anything unless___
A.being asked B.asked C.to be asked D.having been asked
可是我想知道为什么?还有为什么不能选C?不是被动态吗...
单词打错了,请把"og"改成"of"
为什么在这种情况下ask就做非谓语了?能通俗简单地说下,非谓语一般是用在什么情况下的吗?勿复制.