单项选择题


A．they are
B．it is
C．they have
D．there are
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单项选择题
A．in such a caseB．in a wayC．in such a wayD．in a case
A．in such a case
B．in a way
C．in such a way
D．in a case
单项选择题
A．poisonB．rubbishC．waste waterD．dirt
A．poison
B．rubbish
C．waste water
D．dirt
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