【題目】The air in our city is getting much_____ now than a few years ago.
A.clean
B.cleaner
C.cleanest
D.the cleanest

【答案】B
【解析】句意:在我們這個城市里的空氣比幾年前變得更清澈了。根據(jù)句子中的than可知應使用比較級。clean為原級,cleaner為比較級,cleanest為最高級,應選B。

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