单项选择题

In Europe, the umbrella was first used against the rain ______.

A．during the Middle Ages
B．in Rome
C．by the eighteenth century
D．in Greece
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单项选择题
From the last sentence of this passage we conclude that______.
A．businesses usually do not pay much for advertisement
B．businessmen know well that advertisement can bring them more profits
C．advertisement can hardly convince people of the value of the goods
D．advertisement usually costs businesses large amounts of money
单项选择题
Advertisement is mainly paid for by______.
A．the customer
B．the producer
C．increased sales
D．reduced prices
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