You can leave him a note ( )where you are

问题描述:

You can leave him a note ( )where you are
A.to know B.in order to know C.so as to know D.so that he will know

由题目可知,你要给他留个字条,那应该是“让他知道你在哪”
所以这题选D.
You can leave him a note so that he will where you are.
你可以给他留个纸条,这样他就知道你在哪了.