单项选择题

A．Now he understands the system.
B．He has no use for technology.
C．He has to do some calculations.
D．He doesn’t know how to operate the computer.
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单项选择题
A．To improve the diets of hensB．To move chickens into large farmsC．To make chickens sleep before they are killedD．To improve chickens’ lives
A．To improve the diets of hens
B．To move chickens into large farms
C．To make chickens sleep before they are killed
D．To improve chickens’ lives
单项选择题
A．freshmanB．sophomoreC．juniorD．senior
A．freshman
B．sophomore
C．junior
D．senior
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