We prefer that the plan ( ) before being put into execution.

问题描述:

We prefer that the plan ( ) before being put into execution.
A.is fully discussed B.must be fully discussed
C.be fully discussed D.will be fully discussed

We prefer that the plan should be fully discussed before being put into execution.这是完整的句子 其中should可以省略 因为prefer 所以要用虚拟语气那prefer在什么情况下要用虚拟语气啊?作宁愿的意思 用虚拟语气