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单项选择题
A．Cutting the grass.B．Shaving the trees.C．Planting some flowers.D．Planting some trees.
A．Cutting the grass.
B．Shaving the trees.
C．Planting some flowers.
D．Planting some trees.
单项选择题
A．The universe is infinite and looks roughly like a soccer ball.B．The universe is finite and roughly resembles a soccer ball.C．The universe is infinite and is not stable at all.D．The universe is finite and is not stable at all.
A．The universe is infinite and looks roughly like a soccer ball.
B．The universe is finite and roughly resembles a soccer ball.
C．The universe is infinite and is not stable at all.
D．The universe is finite and is not stable at all.
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