单项选择题
A．that B．whom C．which D．what
A．their English is not good enough B．they are afraid they might meet with unfair judgment in these areas C．there is a wide difference between Asian and Western cultures D．they know little about American culture and society
A．the auctioneer knocks the buyer down B．the auctioneer knocks the rostrum down C．the goods are knocked down on to the table D．the auctioneer bangs the table with a hammer