— If there are ____ trees, the air will be cleaner.
— I agree. Then there will be less pollution.
A．much B．less C．fewerD．more
D
此題重點考查四個單詞的含義，根據(jù)語境可知要選擇比較級，故用more表示有更多的樹，空氣就會越清新。污染就會越少。
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