单选题 There are so many kinds of radios in the shop. I can't decide ______.
A. to buy what B. to buy which C. which to buy

【正确答案】 C
【答案解析】[解析] 句意为：商店里有那么多种收音机，我都不知道该买哪一个了。which to buy作decide的宾语。