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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单项选择题
[A] what [C] that[B] which [D] why
A．what
B．which
C．that
D．why
单项选择题
[A] receive [C] bring[B] accept [D] catch
A．accept
B．receive [C] bring
C．catch
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