单项选择题

[A] for [C] on
[B] with [D] as

A．with
B．for [C] on
C．as
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[A] again [C] besides[B] also [D] too
A．again
B．also
C．besides
D．too
单项选择题
[A] earth [C] space[B] atmosphere [D] environment
A．earth
B．space
C．atmosphere [D] environment
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