---        my hat?  

---        .[ ]

A. Where is; Yes, it is.  

B. Where's; No, it isn't.

C. Where's; It's in the backpack  

D. Is it; It's on the table

二里头文化青铜器的代表器物是下列哪种？（）

A、尊

B、鼎

C、爵

D、豆