Are you going to buy a camera ?Yes. But there’re so many kinds that I can’t decide

问题补充：

--- Are you going to buy a camera ?

--- Yes. But there’re so many kinds that I can’t decide to buy.

A. What

B. which

C. how

D. where.

答案：

A. What

(答案→)B. which

C. how

D. where.

解析：本题的含义是你打算买一个照相机，但有许多种类，所以是不知道选择买哪一个，表示选择性的疑问词通常为which，故选B.