They have not made any decision on ______ they are going to do to deal with the waste and control pollution.
问题描述：
They have not made any decision on ______ they are going to do to deal with the waste and control pollution.
A.that B.which C.if D.what
这句话是what做decision的宾语吗?宾语从句?
那主句的主谓宾是什么？
答
D
what=the thing (that.).的事
作为介词on的宾语和定语从句to do的宾语.
（They主语）（ have not made谓语）（ any decision宾语）（ on the thing状语） 【(that) they are going to do定语从句】【 to deal with the waste and control pollution.目的状语】（ on the thing状语） 【(that) they are going to do定语从句】
on ______ they are going to do 那怎么这一句又做宾语从句？？是定语从句，修饰the thing!!!