【題目】The scientist believes there will be____ cars and______ dirty air.
A.less; fewer
B.fewer; less
C.few; fewer

【答案】B
【解析】句意：科學家認為將會有更少的汽車，更少的臟空氣。less更少，修飾不可數(shù)名詞；fewer，更少，修飾可數(shù)名詞復數(shù)，cas可數(shù)名詞復數(shù)，air不可數(shù)名詞，故選B。

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