My spoken English has since I came to this school in August.

问题描述:

My spoken English has since I came to this school in August.
My spoken English has ( )since I came to this school in August.A.raised a lot B.been improved a lot C.raised a lot of D.improved a lot
为什么选D?

raise是及物动词,必须有宾语,所以A和C排除
improve可以作不及物动词,指“改进.改善”,没必要用B被动语态
所以是D为什么不要用被动呢?英语确实是被提高的。have/has been done 现在完成时的被动嘛这里就是陈述一个事实,即,我的口语提高了,而不是强调主观因素,没有必要用“我的口语被提高了”