单项选择题

A．automation
B．mechanization
C．urbanization
D．revolution
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单项选择题
A．behindB．alikeC．aheadD．aside
A．behind
B．alike
C．ahead
D．aside
单项选择题
A．He’s tired.B．He lost the race.C．He has already been to the top of the hill.D．He prefers doing exercise indoors.
A．He’s tired.
B．He lost the race.
C．He has already been to the top of the hill.
D．He prefers doing exercise indoors.
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