单项选择题

The end of the bidding is called "knocking down" because _________.

A．the auctioneer knocks the buyer clown
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

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热门试题

单项选择题

The best color pictures are taken when _________.

A．the sun is directly overhead
B．the range of highlights and shadows is large
C．the sun is lower in the sky
D．black and white film is used

单项选择题

A hazy sun _________.

A．will produce soft lighting
B．will yield somewhat bluish pictures
C．needs to have the light supplemented by reflectors
D．will expose shaded areas fully