Therearesomanykindsofmobilephoneshere.Wecan'tdecide    ...

問題詳情：

There are so many kinds of mobile phones here. We can't decide                 .

      A. what to buy        B. to buy what       C. which to buy    D. to buy which

【回答】

C

知識點：非謂語動詞

題型：選擇題