everything depends on_they will support you about it该选择题答案分析

题目

everything depends on_they will support you about it该选择题答案分析
Everything depends on__they will support you about it.
Aif B.which C.whether D.that
请问各位,答案是C,为什么呢?谢谢

答案

C
因为depend on 中 on 是介词,也就是说后面的是宾语从句,表示是否要用whether.因为 if 不可以引导宾语从句.当引导主语.表语.同位语从句时两者可以互换.