单项选择题

A．They had to carry sacks of coal up steep ladders.
B．They had to crouch in tiny tunnels and dig the coal out.
C．They had to pull trucks of coal along passage that were only a few feet high.
D．They had to dig wider tunnels for women and children to work in.
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单项选择题
Which of the following does NOT support the statement America is not the only country wrestling with immigration. (Para. 1)
A．Six countries approve of the European "integration contracts".
B．Britain and France are amending their immigration laws.
C．Britain and Italy are tortured by the deportation of immigrant criminals.
D．Spain was trying to stop the pour of immigrant criminals from west Africa to its country.
单项选择题
Which of the following is true about leapfrog technology
A．Developing countries do not necessarily follow the same technology path as developed nations.
B．Leapfrog technology can not spread very fast because they face competition from the earlier systems.
C．India has developed from the agriculture economy to a high-tech service economy.
D．New versions of Microsoft Windows is always superior to the old version.
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