单项选择题

[A] environment [C] atmosphere
[B] space [D] earth

A．space
B．environment [C] atmosphere
C．earth
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单项选择题
[A] from [C] as[B] than [D] away
A．from
B．than
C．as
D．away
单项选择题
[A] but [C] so[B] because [D] for
A．but
B．because
C．so
D．for
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