If the operation ________ carefully prepared, it would not have been successful.
A、wasnotC
语法题：虚拟语气。
Thefurnitureinherbedroomisquitedifferentfrom________inthelivingroom.
Pleaseremindme_______herthisnote.
Idon’tneedanyhelpatthemoment,butI_____youroffer.
Thenewdiscovery_______beofgreatservicetomankind.
Iftheoperation________carefullyprepared,itwouldnothavebeensuccessful.
