单项选择题


A．earth
B．atmosphere
C．space
D．environment
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单项选择题
A．As soon asB．As well asC．As much asD．As possible as
A．As soon as
B．As well as
C．As much as
D．As possible as
单项选择题
A．put up withB．keep up withC．come up withD．catch up with
A．put up with
B．keep up with
C．come up with
D．catch up with
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