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

分析 如果有更多的樹,空氣中二氧化碳的數(shù)量就會(huì)越少.

解答 答案:D.結(jié)合If there are more trees,the amount of CO2in the atmosphere will be和常識(shí)可知樹越多,二氧化碳就會(huì)越少,the amount of…的數(shù)量,后跟不可數(shù)名詞,故用little的比較級(jí)less,故答案是D.

點(diǎn)評(píng) 比較級(jí)(Comparative Degree)就是將二者進(jìn)行比較產(chǎn)生的詞形,是由形容詞原級(jí)轉(zhuǎn)化而來(lái)的,一般是在原級(jí)后面加er,也有一些不規(guī)則的轉(zhuǎn)化,比如good-better,bad-worse,有很多.相對(duì)二者的比較,還有三者及以上的比較,這時(shí)就產(chǎn)生了最高級(jí).

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