题目内容
（请给出正确答案）
In 1847 most countries of the world were ______.
A. not yet using postage stamps
B. collecting valuable stamps
C. buying stamps from Neuritis
D. printing their own stamps
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更多“In 1847 most countries of the …”相关的问题
In 1847 most countries of the world were______.
A．not yet using postage stamps
B．collecting valuable stamps
C．buying stamps from Mauritius
D．printing their own stamps
The computer will soon affect ______.
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According to the spirit of the ancient Olympic Games, ____________
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