If the operation ________ carefully prepared, it would not have been successful.
A、wasnotC
语法题：虚拟语气。
Thetwogirlscompetedwitheachother______thehighestmark.
Hewouldhavegivenyoumorehelp,ifhe________sobusy.
Wateriscomposed_______hydrogenandoxygen.
Thefurnitureinherbedroomisquitedifferentfrom________inthelivingroom.
Themeeting_____nextweekwillbeofgreatimportance.
