If only the committee __ the regulations and put them into e
If only the committee __ the regulations and put them into effect as possible.
A.approve B.will approve C.can approve D.would approve
为什么是D呢,if哦nly不是引导从句吗,那么对照虚拟语气表,那么ABCD都不对啊.would+V不是主句才用吗?