Make a short video of auction in group , the video should last at least one minute. The goods for auction can be chosen from the Yard Sale you made last week. The useful expression for auctions are ? The opening bid for XXX is... We’ll start the bidding with... Who will bid for...? Going, going, gone; Going once, twice, sold; Minimum Bid Increment pass Please uopload your video in the answer column before next class. 请把视频和台词上交在答案处,下次英语课之前交。组员和拍卖商品需出镜。