The reason why the end of the bidding is called "knocking down" is that _________.A.the au
The reason why the end of the bidding is called "knocking down" is that _________.
A.the auctioneer knocks the buyer down
B.the buyer knocks the auctioneer down
C.the auctioneer knocks the rostrum down
D.the auctioneer bangs the table with a small hammer