单项选择题


A．filled
B．polluted
C．stopped
D．blocked
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单项选择题
A．grow smallerB．disappearC．get biggerD．still increase
A．grow smaller
B．disappear
C．get bigger
D．still increase
单项选择题
A．a good manyB．more or lessC．more and moreD．a small number of
A．a good many
B．more or less
C．more and more
D．a small number of
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