单项选择题


What conclusion can we make about mass-production

[A] Many people are engaged in production.
B. The cost of production is lowered.
C. Goods produced are of low quality.
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单项选择题
In 1847 most countries of the world were______.
A．collecting valuable stamps
B．printing their own stamps
C．not yet using postage stamps
D．buying stamps from Mauritius
单项选择题
Why did John look worried
A． He hurt his legs and couldn’t walk.
B． He couldn’t find the tickets.
C． His wife fell ill.
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