题目内容

6．If there are more trees，the amount of CO2in the atmosphere will be _____．（　　）
A．greaterB．moreC．fewerD．less

分析 如果有更多的树，空气中二氧化碳的数量就会越少．

解答 答案：D．结合If there are more trees，the amount of CO2in the atmosphere will be和常识可知树越多，二氧化碳就会越少，the amount of…的数量，后跟不可数名词，故用little的比较级less，故答案是D．

点评 比较级（Comparative Degree）就是将二者进行比较产生的词形，是由形容词原级转化而来的，一般是在原级后面加er，也有一些不规则的转化，比如good-better，bad-worse，有很多．相对二者的比较，还有三者及以上的比较，这时就产生了最高级．

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