More and more people have a low-C life and the air is getting much
    than a few years ago.
A.cleanB.cleanestC.cleanerD.the cleanest
C
英語(yǔ)中在表示兩個(gè)事物進(jìn)行對(duì)比時(shí),一般用比較級(jí)結(jié)構(gòu),常見(jiàn)搭配結(jié)構(gòu)為比較級(jí)+than,但是當(dāng)比較范圍確定在兩個(gè)事物之間時(shí),即使句子結(jié)構(gòu)有所不同也用比較級(jí)。也就是說(shuō),只要是兩個(gè)事物進(jìn)行對(duì)比,不管什么結(jié)構(gòu)都用比較級(jí)。形容詞的最高級(jí)表示在三個(gè)及三個(gè)以上的多個(gè)中進(jìn)行比較,確定其比較范圍是解答此類(lèi)問(wèn)題的關(guān)鍵,注意形容詞最高級(jí)是特指前面定冠詞不能省略。句意:越來(lái)越多的人過(guò)一種低碳生活,空氣變得比前幾年干凈了。結(jié)合語(yǔ)境可知本句表示與前幾年的對(duì)比,故用形容詞的比較級(jí),選C。
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