ifthewholeoperation______beforehand,agreatdealoftimeandmoneywouldhavebeenlost.
Ifthewholeoperation______beforehand,agreatdealoftimeandmoneywouldhavebeenlost.
a.wasnotplannedb.hasnotbeenplanned
c.hadnotbeenplannedd.werenotplanned
我认为是A,因为计划在前,但答案却是C,搞不懂