I can't decide______A to choose which presentB which present to choose 选哪个?为什么?

I can't decide______A to choose which presentB which present to choose 选哪个?为什么?
I can't decide______
A to choose which present
B which present to choose 选哪个?为什么?

I can't decide______A to choose which presentB which present to choose 选哪个?为什么?
B 由于是不能决定,所以应该带有疑问.不定式的疑问词必须放在前面.
例如：I don't konw how to do it.
I don't know what to do next.
注意：不能有why这个词.

选B的
这是一种语感啊...动词不定式用的时候疑问词提前
真心没什么好解释的
请采纳

1、decide决定，及物动词。常常要求不定式作宾语：decide to do sth决定做某事情。
2、疑问代词／疑问副词＋不定式,构成复合不定式，它们相当于一个名词用，可以用来作宾语、表语等。
B、是复合不定式，作decide的宾语。
答案：B