There are so many books.I really can't decide___.

问题描述:

There are so many books.I really can't decide___.
A.Where to buy B.which to buy C.what to buy

B.
主要从意思上区分.
有太多的书了,我都不知道(买哪一本了)——自然是:选择哪一本,which to buy/choose.
A 地点,不对,因为就在这买,知道地点了;
C买什么?也不对,因为买的是书,也知道了.