______ the help of experienced career instructions.

问题描述:

______ the help of experienced career instructions.
______ the help of experienced career instructions,this type of job-hunting training_____to be very efficient..
A.By ; has proved B.With ; has proved C.Under ; is proving D.With ; is proved
答案是B为什么不选D呢,不应该是被证明吗?

prove 也有【被证明】的意思(不要怀疑 这是真的!) 例如
The inquiry proved to be very difficult.调查被证明很困难.
有问题再问吧 希望有所帮助~