Iftheoperation________carefullyprepared,itwouldnothavebeensuccessful.
A、wasnotC
语法题：虚拟语气。
After months of voyage, Columbus arrived in ______ later proved to be a new continent.
Is it Shakespeare Theatre _______ you are going to watch the play The Merchant of Venice?
Because of the bad weather, the sports meet had to be ________.
It is important to ________ your skin from the harmful strong sunlight.
Thecentraltheatrehasaseating________ofmorethan3,000people.
