There are so many beautiful presents in the shop that I don't know __________.

问题描述:

There are so many beautiful presents in the shop that I don't know __________.
A which one to choose
B to choose which one
C which to choose one
D to choose one which

选A,因为know 是及物动词,需要跟宾语which one,并且从句里的疑问句式应该转化为陈述句式,故选A.