_____what you have been told to, or you will be punished. A to do B doing C having done D did

问题描述:

_____what you have been told to, or you will be punished. A to do B doing C having done D did
答案给你是B怎么解释呢?

what在这里引导的是宾语从句,即做主句的宾语,又做从句的宾语.
然后动词作主语需变成动名词,排除掉A、D.having done表示的是已经完成,时态不对,所以选B.
意思是:做你已经被告诉要做的事,否则,你将会被惩罚!