单项选择题

A．The ways of keeping food eatable for a longer time.
B．The killing of bacteria.
C．The invention of the refrigerator.
D．The role bacteria play.
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单项选择题
The passage tells us that ________.
A．sometimes advertisements really sell what the consumer needs
B．advertisements occasionally force consumers into buying things they don’’t need
C．the buying motives of consumers are controlled by advertisements
D．fire insurance is seldom a worthwhile investment
单项选择题
A．Looking for a young lady.B．Looking for her wristwatch.C．Looking for a man wearing a wristwatch.D．Looking for a young gentleman.
A．Looking for a young lady.
B．Looking for her wristwatch.
C．Looking for a man wearing a wristwatch.
D．Looking for a young gentleman.
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