Iftheoperation________carefullyprepared,itwouldnothavebeensuccessful.
A、wasnotC
语法题：虚拟语气。
支持代孕的理由有
He was ______ to withdraw from running for the presidency.
Studentsshould_____theirowninterestsaswellasdotheirschoolwork.
If the operation ________ carefully prepared, it would not have been successful.
They prefer to _______ the rest of the morning walking in the garden.
