单项选择题

A．They had fully developed electrical plants.
B．They had an adequate number of workers.
C．They had farmland that would not be flooded.
D．They had extremely rich investors.
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单项选择题
A．He wants to go early to avoid a traffic jam.B．He wants to leave the theater before the movie is over.C．He doesn’t know the way to the theater.D．He doesn’t usually get up at 7:00.
A．He wants to go early to avoid a traffic jam.
B．He wants to leave the theater before the movie is over.
C．He doesn’t know the way to the theater.
D．He doesn’t usually get up at 7:00.
单项选择题
A．Exploration of the oceans.B．Sophisticated method.C．Satellite tracking technology.D．Measuring devices.
A．Exploration of the oceans.
B．Sophisticated method.
C．Satellite tracking technology.
D．Measuring devices.
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