Now the air in our city is _______ than it used to be．Something must be done to stop it．
A．very goodB．much betterC．rather bad D．even worse
D

試題分析：結(jié)合下文，必須做些事來(lái)阻止這種情況�？芍衔木湟鉃椋含F(xiàn)在我們市的空氣比過去差多了。Than前面一般用比較級(jí)形式，結(jié)合語(yǔ)境可知選D。
點(diǎn)評(píng)：英語(yǔ)中單音節(jié)形容詞副詞一般是在后加er構(gòu)成比較級(jí)，雙音節(jié)多音節(jié)形容詞副詞的比較級(jí)一般是在前面加more構(gòu)成，但也有少部分加er的，牢記即可。
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