单项选择题

A．Because he is interested in the subject.
B．Because he has already written a paper on it.
C．Because he doesn’’t know anything about it.
D．Because it is very abstract.
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单项选择题
What was the most special about die map sold at an auction in London
A．It was sold at a very high price.
B．It was delicately drawn.
C．It was the first to name a newfound continent west of Europe "America".
D．It was the centerpiece of the sale of maps.
单项选择题
The third paragraph emphasizes________.
A．about 90% of sugar used as food
B．only 10% used in industry
C．sugar used for making plastics
D．future uses of sugar
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